Lok helmet Lok helmet Helmet lock with T-bar, cable and combination lock. The Helmetlok can be used to lock the helmet to the bike. It is not necessary to use the T-bar extension if your helmet has a “D” ring, but it may be useful if your helmet has a quick release buckle. The extension slides into the “quick release” buckle and the Helmetlok passes through the hole and clips onto the bike! Use the cable if you want to attach your jacket, bag or a second helmet to your bike. The ORIGINAL Helmetlok is a secure lock: once the code is entered, it cannot be changed unless you use the original code to change the numbers. Shipping Payment Methods Paypal NB as professional sellers we can issue a regular invoice if expressly requested in the notes during the purchase phas.