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Sold by: 365 Cycles
Sold by: 365 Cycles
(10528 ratings)
86% positive over last 12 months
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Kryptonite 16mm Bicycle Stronghold Anchor Bike Lock , Black

4.5 4.5 out of 5 stars 764 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Bike U-Locks by Kryptonite

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Brand Kryptonite
Special Feature 16mm hardened Carbon Alloy Steel Shackle
Lock Type Ground Anchor
Item Dimensions LxWxH 16 x 10.8 x 3.5 inches
Material Alloy Steel

About this item

  • PERMANENT LOCKING POINT for use indoors or outdoors to keep vehicles and bicycles safe
  • Attach to solid concrete ground/walls, or to truck/trailer beds
  • 16mm hardened CARBON ALLOY STEEL SHACKLE
  • 5/8” cement anchor bolts installed directly into the cement
  • Includes 2 MASONRY BITS (1- initial pilot hole, 1-final moly-bolt diameter)
  • Steel shackle lays flat within domed body when not in use, making it safe to walk or drive over
  • Recommended for both residential and commercial applications

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Top Brand: Kryptonite

Highly Rated
4.5/5 star rating from 100K+ customer ratings
Trending
50K+ orders for this brand in past 3 months
Low Returns
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From the manufacturer

Stronghold Anchor

Stronghold Anchor

Lifetime Warranty

Stronghold Anchor

Permanent Locking Point

For use indoors or outdoors to keep vehicles and bicycles safe

Residential and Commercial Applications

Attach to solid concrete ground/walls, or to truck/trailer beds

Kryptonite Lifetime Warranty

10/10

Rated 10 on our Security Scale making this a secure solution in any area 24/7.

Product Description

PERMANENT LOCKING POINT for use indoors or outdoors to keep vehicles and bicycles safe. Attach to solid concrete ground/walls, or to truck/trailer beds. 16mm hardened CARBON ALLOY STEEL SHACKLE. 5/8” cement anchor bolts installed directly into the cement. Includes 2 MASONRY BITS (1- initial pilot hole, 1-final moly-bolt diameter). Steel shackle lays flat within domed body when not in use, making it safe to walk or drive over. Recommended for both residential and commercial applications. Product dimensions: 7.5” (19cm) anchor diameter, 1.65” (4.2cm) anchor height.

Product information

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Kryptonite 16mm Bicycle Stronghold Anchor Bike Lock , Black


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Customer reviews

4.5 out of 5 stars
4.5 out of 5
764 global ratings

Customers say

Customers like the sturdiness and quality of the powersports vehicle part. For example, they say it's a very solid product, the anchor seems quite sturdy, and it'll hold really well. That said, some complain about the size, saying that the drill bit isn't 100% fit. Opinions are mixed on ease of installation.

AI-generated from the text of customer reviews

103 customers mention84 positive19 negative

Customers like the sturdiness of the powersports vehicle lock. They mention that it's a very solid product, the anchor seems quite sturdy, and it will hold really well. Some say that it was an ordeal to install, but it'll be secure to use. Overall, customers are happy with the quality and durability of the lock.

"...But hardened eye bolts are hard to find. Nice strong forged ones, sure, but they're not hardened and are very saw-able...." Read more

"...There is nothing flimsy at all with the entire construction, even the plastic cap was thick, so thick that a heavy vehicle can easily drive over it..." Read more

"Positives: Very solid product. Quality build...." Read more

"...The device feels pretty secure and combined with a big heavy kryptonite lock and chain will definitively make taking the bike a lot more difficult..." Read more

17 customers mention12 positive5 negative

Customers like the quality of the powersports vehicle part. They say it's a well-thought-out product, unique, and a good visual deterrent for would-be thieves.

"...The finished installation looks nice - about as elegant as one can expect a chain on a floor to be - and feels very solid...." Read more

"...The anchor is actually a very nice, clean looking piece once installed. I'm very happy to have a permanent locking location right outside my door...." Read more

"Love the product. Bought five. Was very disappointed with the poor quality drill bit...." Read more

"...I fixed the hole, reassembled the fastener, and got it all done. It looks great...." Read more

61 customers mention38 positive23 negative

Customers are mixed about the ease of installation. Some mention that it's pretty straight forward, while others say that the instructions are garbage and the job becomes increasingly difficult.

"...Final impressions: excellent product, easy to follow instructions and all materials needed were supplied for a successful installation." Read more

"...Instructions are GARBAGE--included ones don't give depths or hints...." Read more

"...My installation went very well. Allow yourself some time, follow the directions and your install will go very well." Read more

"...Installation is pretty straight forward. Hammering in the sleeve/screw combos was a little sketchy though...." Read more

16 customers mention4 positive12 negative

Customers have negative opinions about the size of the bolts. They mention that the bolt is much bigger than the picture, and it's difficult to insert them into the hole. Some customers also mention that they are too small to get any decent leverage.

"...They fit fine but are just too small to get any decent leverage...." Read more

"...My first impressions: it was big, heavy and felt like it was over engineered...." Read more

"...Aside from all that, great product. It's attractive, has plenty of room to loop a huge chain or U-bolt through, and DEFINITELY isn't coming back out..." Read more

"This thing is huge. I found a large, heavy package on the porch and couldn't recall ordering anything that big or heavy...." Read more

Solid and Secure ground anchor
5 Stars
Solid and Secure ground anchor
I was quite overwhelmed upon receiving this product. My first impressions: it was big, heavy and felt like it was over engineered. There is nothing flimsy at all with the entire construction, even the plastic cap was thick, so thick that a heavy vehicle can easily drive over it without being damaged. I did have some doubts on how the installation will proceed after reading some of the negative reviews here. So I decided to read and understand the instruction manual. We set the mounting plate on the concrete pavement and drilled a hole with the pilot drill on the first marked hole on the plate. Once the drill was an inch into the material, we removed the plate and drilled to the length of the anchors. We vacuumed all the dust out then proceeded to drill with the final moly. We then carefully vacuumed all of the dust out the pushed the anchors into the hole, placed the mounting plate and screwed the bolt tight. Note that if the hole is carefully cleaned of all the drilling material, you don’t have to hammer the anchors, you can simply work them in using your fingers. We then proceeded to drill into hole #2 of the mounting plate with the pilot drill and repeated the procedure above, and the same went for hole #3. After all the anchors were placed we tightened the bolts and the plate gripped the concrete securely. There was no play or wiggle at all that can be perceived. The supplied bolt head seals/caps were hammered in place that made the installation permanent. Finally the plastic cover was screwed in place and what you see is the product successfully installed. Many folks advised using a hammer drill. We used a regular corded Dewalt drill and took our time drilling and vacuuming the dust and it worked very well. The job was surprisingly easy and straightforward. Best of all we now something to secure our bicycles and am confident that it will perform as designed. Final impressions: excellent product, easy to follow instructions and all materials needed were supplied for a successful installation.
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Top reviews from the United States

Reviewed in the United States on September 4, 2016
10 people found this helpful
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Reviewed in the United States on December 8, 2019
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5.0 out of 5 stars Solid and Secure ground anchor
Reviewed in the United States on December 8, 2019
I was quite overwhelmed upon receiving this product. My first impressions: it was big, heavy and felt like it was over engineered. There is nothing flimsy at all with the entire construction, even the plastic cap was thick, so thick that a heavy vehicle can easily drive over it without being damaged. I did have some doubts on how the installation will proceed after reading some of the negative reviews here. So I decided to read and understand the instruction manual. We set the mounting plate on the concrete pavement and drilled a hole with the pilot drill on the first marked hole on the plate. Once the drill was an inch into the material, we removed the plate and drilled to the length of the anchors. We vacuumed all the dust out then proceeded to drill with the final moly. We then carefully vacuumed all of the dust out the pushed the anchors into the hole, placed the mounting plate and screwed the bolt tight. Note that if the hole is carefully cleaned of all the drilling material, you don’t have to hammer the anchors, you can simply work them in using your fingers. We then proceeded to drill into hole #2 of the mounting plate with the pilot drill and repeated the procedure above, and the same went for hole #3. After all the anchors were placed we tightened the bolts and the plate gripped the concrete securely. There was no play or wiggle at all that can be perceived. The supplied bolt head seals/caps were hammered in place that made the installation permanent. Finally the plastic cover was screwed in place and what you see is the product successfully installed. Many folks advised using a hammer drill. We used a regular corded Dewalt drill and took our time drilling and vacuuming the dust and it worked very well. The job was surprisingly easy and straightforward. Best of all we now something to secure our bicycles and am confident that it will perform as designed. Final impressions: excellent product, easy to follow instructions and all materials needed were supplied for a successful installation.
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6 people found this helpful
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Top reviews from other countries

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B. Miller
5.0 out of 5 stars Totally satisfied
Reviewed in Spain on February 13, 2024
Robert
5.0 out of 5 stars 10/10 - kommt sogar mit Bohrköpfen
Reviewed in Germany on November 25, 2023
Customer image
Robert
5.0 out of 5 stars 10/10 - kommt sogar mit Bohrköpfen
Reviewed in Germany on November 25, 2023
Das Kryptonite Stronghold eignet sich sehr gut für Roller, Motorräder oder Fahrräder. Seine robuste Konstruktion und einfache Installation machen es zu einem verlässlichen Bodenanker. Die Vielseitigkeit ermöglicht eine flexible Anbringung an verschiedenen Orten. (Im Boden, an einer dicken Betonwand, etc)

Ich finde es super, dass der Anker sogar mit den notwendigen Bohrköpfen kommt (1x kleinerer Primer-Bohrkopf zum Vorbohren, 1x dicker 16mm Bohrkopf für die Metalldübel).

Die mitgelieferten Sechskantschlüssel sind zu kurz. Der Anker ist damit nicht montierbar, man bekommt die Schrauben nicht zugezogen. Idealerweise hat man ein Rohr um eine Hebelwirkung zu erzielen, oder eine Impact Drill mit einem guten Hex Bit.
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Antoine Hartwig
5.0 out of 5 stars Très facile à installer
Reviewed in France on October 11, 2023
bearlake
5.0 out of 5 stars Good secure anchor point
Reviewed in the United Kingdom on October 16, 2022
One person found this helpful
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Brwnsgr
5.0 out of 5 stars Incredibly secure with low profile.
Reviewed in Canada on October 7, 2020
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Brwnsgr
5.0 out of 5 stars Incredibly secure with low profile.
Reviewed in Canada on October 7, 2020
Absolutely ideal for securing the furniture in front of our house. Based on some of the other reviews we were concerned as to how difficult this would be but we were finished inside of 30 minutes with no problems.
A few important points:
1. Use the correct tools. We have a pretty heavy duty drill but decided to rent a hammer drill instead. Absolutely no problem drilling the holes. Easy.
2. The holes must be vertical in all directions. Have another person confirm that you are straight up and down N/S and E/W.
3. Drill the initial holes one at a time as per the directions. Put tape on your drill bit so you know how deep to drill. You don’t want to go all the way through the concrete if possible, keeps moisture out.
4. We blew out each hole after drilling with compressed air. There will be A Lot of dust down there and if you don’t blow it out you will have trouble. Our ShopVac did not get it all.
5 We added Weldbond to the housings before putting them in place. Probably not necessary but we wanted to ensure the housings couldn’t slip out if there was a problem drilling.
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3 people found this helpful
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