SAF Lock - Altor Locks
SAF Lock - Altor Locks
SAF Lock - Altor Locks
SAF Lock - Altor Locks
SAF Lock - Altor Locks
SAF Lock - Altor Locks
SAF Lock - Altor Locks
SAF Lock - Altor Locks
SAF Lock - Altor Locks
SAF Lock - Altor Locks

SAF Lock

The Altor SAF Lock is the world's first angle grinder proof bicycle 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 our 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 Features:

  • A 14mm hardened steel shackle
  • Our patented aluminum protective shackle
  • 80mm shackle diameter
  • Double Locking Cross Bar
  • High security disc detainer lock mechanism
  • Soft Outer Coating to protect your bike
  • 6.2 kgs total weight
  • 200 x 280 mm outer dimension
  • 80 x 140 mm inner dimension

This Package Includes:

  • An Altor SAF Locks
  • matching laser engraved high security disc detainer keys

All of our products are covered by our extensive warranty and 30 day trial


Customer Reviews

Based on 22 reviews
Kiara O.

This lock is HUGE! I purchased one for my zugo ebike and honestly it's so huge and heavy I don't think any thief would bother trying to cut through this thing. Other than the fact that the lock is super heavy, I think it's the perfect lock for anyones expensive investment!


Fantastic product. Feel very safe when going to the shops and leaving my bike locked up outside. Great work ALTOR.

Altor is strong as phuck

I'm very pleased with the lock. I know it wasn't intended to be a carry around lock but I'll take it with me whenever I do deliveries. It would be kinda nice to have a mount bracket or heavy duty carry bag.

Bike thieves using angle grinders in broad daylight is the new normal. Don't let it happen to you.

Click here to see why #BikeThievesSuck

The SAF Lock is 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 is the world's 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 you may already be considering using. The only, and most important, difference is that those chains can be cut in under 45 seconds while the SAF Lock can't.

Frustrated Cyclists

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.

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.

Read More

Angle Grinder Resistant

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

Pick Resistance

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

Resists Traditional Attacks

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

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.

Double Up

The Double SAF Lock comes with eight matching keys, so you can share with a friend and have a backup in case one is lost. Leave one at work and one at home, or share one with a friend

Buy Now

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



Pounds: 13.2

Grams: 6000

Shackle Diameter

Inches: 3.2

mm: 80

Lock Outer Width

Inches: 8.0

mm: 200

Lock Outer Length

Inches: 11.0

mm: 280

Lock Inner Width

Inches: 3.2

mm: 80

Lock Inner Height

Inches: 5.5

mm: 140