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SAF Lock

The Altor SAF Lock is the world's first angle grinder resistant lock. Angle grinders have become the new norm in bike theft yet every bike lock on the market is only designed to protect against hand tools. At Altor we've been making and selling bike locks for years and have seen first-hand how destructive angle grinders can be. It became our mission to do the impossible.

We created the best, most secure bike lock in the world. Made from a 14mm hardened steel shackle, wrapped in patented aluminum shell and attached on both sides to a double locking cross bar inside a hardened steel case, the SAF Lock will defend your bike against even the most determined attack. The SAF Lock comes with four matching keys, so you can share with a friend and have a backup in case one is lost.

Ships by the end of the next business day after your order is placed.

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SAF Lock Features

  • A 14mm hardened steel shackle
  • Our patented aluminum SAF Tech shackle
  • 80mm shackle diameter
  • Double Locking Cross Bar
  • High security disc detainer lock mechanism
  • 13.2 lbs (6.0 kgs) total weight
  • 200 x 280 mm outer dimension
  • 80 x 140 mm inner dimension
  • 4 Matching Keys
  • Soft Outer Coating to protect your bike

Angle Grinder Resistant

The combination of material and geometry of the SAF Tech shell quickly wears through angle grinder discs and batteries.

Pick Resistant

Designed from the ground up, the SAF Lock uses an eight disc disc-detainer lock mechanism with false gates and unique key profile that makes picking as difficult as possible.

Resistant to Traditional Attacks

While the SAF Tech protects from angle grinders, The SAF locks through hardened steel core shackle and anti rotation locking bars stand up to the toughest of hand tools.

Bicycling Magazine Cut Test

Bicycling Magazine took our lock to task and produced a comprehensive testing video. While it takes seconds to get through normal bicycle locks, it took Bicycling Magazine over an hour and multiple angle grinders, blades and batteries to get through our lock. Read and watch their complete review here.

LockPickingLawyer Pick Test

The LockPickingLawyer says "the chances of this being picked on the streets are essentially zero". Watch as he picks the SAF Lock with a pick he custom made himself because there are no picks commercially available for the SAF Lock.

Perfect For:

Overnight Locking.

The SAF Lock is the ideal lock for keeping your bike safe overnight. It is specially designed to thwart any attempts to cut it. This isn't your everyday carry lock. This the worlds strongest lock.


Your E-bike is a valuable target for would-be thieves and at 13.2 lbs (6.0 kg) the SAF Lock weighs less than many chain locks that you may be already considering using. The only, and most important, difference is that those chains can be cut in under a 45 seconds while the SAF Lock can't.

People tired of their bike being stolen.

Has your bike been stolen? After years of designing and selling locks, we know that angle grinders defeat even the best of locks. Since the advent of the affordable portable angle grinder, thieves have increasingly traded up their bolt cutters for angle grinders. The SAF Lock is the first and only lock designed to combat this.


The interior of SAF Lock is the same size as many U-locks.

The SAF Lock weighs less than some of the highest security chain locks on the market.

SAF Lock

(Angle Grinder Dies First)

13.2 Pounds

(6000 Grams)

Leading Chain Lock

(18 Second Cut Time)

15.25 pounds

(6920 Grams)

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