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Kryptonite Keeper 512 Cable and Combo Lock

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Kryptonite's Keeper 512 Cable and Combo Lock is a self-coiling, combination cable lock for use as a bicycle or component safety measure. Helps prevent opportunistic bicycle thieves.


  • Cable Diameter: 3/16” (5 mm).
  • Cable Length: 4’ (120 cm).
  • Weight: 0.25 lbs (0.11 kgs).
Ordered by Most Relevant First
5 stars
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1 stars
Reviewed 10/5/2017
by Triker Bill
Lancaster, PA
Overall Rating
1 of 1 customers found this review helpful.
Lightweight, to keep them honest.

I wanted something light weight. I didn't need a super secure lock, just something to keep a kid from doing a quick grab, for example. This is strong, but light weight. Exactly what I needed.

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Reviewed 12/6/2012
by StllRiding
Cycling Enthusiast
Lincoln, CA
Value Rating
Overall Rating
12 of 12 customers found this review helpful.
Good basic cable lock.

Not going to keep your bike safe from someone who is really out to take it, but will add a little security from the person looking for a free ride. 4 numbers are easy enough to remember. Much easier and lighter to carry than the real secure locks.

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Reviewed 10/30/2017
by Anonymous
Overall Rating
Perfect jersey-pocket lock

This lock fits very nicely into a pocket, and offers a reasonable level of security in places where serious thieves are not about. My only complaint is that the barrel seems to position itself in such a way that the line to which the combo is dialed is hard to see. Maybe it works better for lefties?

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