Would work well as a DIY, but not great as a commercial product.  You could commercialize it, but you’d need a larger number of screw types, similar to how Theft-deterrent lug-nuts work on cars.

Would work well as a DIY, but not great as a commercial product.  You could commercialize it, but you’d need a larger number of screw types, similar to how Theft-deterrent lug-nuts work on cars.

The idea is that bike thieves would know this particular brand of lock would blow up on you so they wouldn’t try and cut through it. Might have to be a DIY affair though, as any company manufacturing them would be up to their neck in lawsuits.

I ride a self-built recumbent that most people think is difficult to ride (until they try it).  The idea that it’s difficult to ride probably deters most casual thieves and I always lock it to deter the rest of them.  I have no fantasies that my lock is tough enough to withstand bolt cutters or even just a dremel tool with a cutoff wheel so I may have to build a replacement some day.  C’est la vie.