McGard UHS Security Bolt Set (4 Bolts + 1 Key). 14x1.5 thread. With a 60° cone. For increased security, the UHS series bolt head has a rotating collar. which makes it extremely difficult to open them without a special key. The UHS series corresponds to Thachams 4-level security category. Do not use a compressed air screwdriver to tighten the safety bolts! Each package comes with an ID number. on the basis of which you can order a spare key!