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Kryptonite 330202 Black 16mm Above Ground Stronghold Anchor
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- 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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|Item Dimensions||3.5 x 10.8 x 16 inches|
|Item Display Weight||5.9 pounds|
|Item Weight||6.06 pounds|
|Material Type||cast iron|
|Model Name||Kryptonite Stronghold W/Anchor|
|Shipping Weight||6.85 pounds|
Permanent locking point for indoor or outdoor use to keep vehicles and bicycles safe. Attach to ground wall truck or trailer bed. 16mm hardened carbon alloy steel shackle. 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 customer reviews
That said, this was pretty difficult to install. We used a Makita hammer drill and it took about an hour. Although this product ships with two drill bits, they don't seem to be of the highest quality. So with each hole drilled, the bits are less sharp and the job becomes increasingly difficult.
HERE ARE SOME TIPS:
Drill a little bit deeper than you think you need to go and wiggle the drill bit a little, because the anchors are very snug and it's very easy to damage the anchors when you're tapping them into the concrete holes.
Use a vacuum to remove concrete dust from the holes. The handle of a plastic spoon worked well to get the dust from the bottom of the hole.
IMPORTANT: When you are tapping the anchors into the concrete holes, DO NOT hit them hard. The anchors will break or you will strip the threads. If you can't tap them in lightly with a hammer, take them out and make the holes a tiny bit wider.
Also, the instructions don't say this, but make sure the anchor bolts are screwed down by hand (seated) BEFORE you start tapping them into the concrete holes. If the bolt is not seated, the tapping pressure will go to the threads of the bolt and nut. And the threads will strip easily. We found this out the hard way.
If you're not confident about doing this yourself, call a concrete contractor. They will install it for you for about $75.
The only issue I had with the product are the self tapping bolts. As other reviewers have mentioned, they are held together by a VERY flimsy piece of metal that comes off if disturbed slightly (like when you are hammering them into the concrete).
The metal came off, and the pieces went flying everywhere and were lost in the hole in the concerete. This means the anchor is only being held by 2 bolts instead of the three that it came with. If they are going to be this flimsy, at least ship it with an extra bolt.
If it weren't for these flimsy / low quality self tapping screws, I would rate this product 5/5 stars.
I wanted piece of mind. I bought this, the 5 ft. Kryptonite chain, and the Kryptonite disc brake lock.
Let me tell you about installation of this thing: It's not as bad as it seems, but you will most likely feel in over your head unless you've drilled through masonry before.
YOU NEED TO USE A HAMMER DRILL.
I looked up the price to rent one and noticed it was actually the same as buying one through Amazon, so I picked one up for $30. Kryptonite supplies two bits, which honestly were probably low quality, but they got the job done. You need to apply a lot of downward pressure to drill to the proper depth. You have to ensure that you've gone absolutely far enough, AND cleaned out the hole as best as possible, otherwise you'll hammer the bolt sockets into the sidewalk and realize they won't go all the way down. This would be a huge mess as the entire point of those sockets is to be secure against removal.
Once you have drilled one hole perfectly, you can line up the base and drill the other two. Again, you have to be really sure that the location is good and that the holes line up.
Assuming all goes well, the installation is actually not that bad. Really just take your time with the drilling, follow the instructions, and be prepared to get your hands dirty. 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. The overall investment is pretty minor when you consider the thought of losing your bike entirely, and the lengthy and costly process that entails.