Tired of worrying about your nice alloy wheels getting stolen? This set gives you peace of mind. It includes 20 black alloy wheel locking bolts (sometimes called \tuner key\ bolts). They have a unique pattern that requires a special key (included) to remove them. The thread is M14 x 1.5 with a 28mm length, which fits many Volkswagen (VW), Audi, Seat, and Skoda models. They're made by Bimecc in Italy (part # NBS 153), so you know the quality is there. The black finish gives a sleek, sporty look. You replace one standard lug bolt on each wheel with one of these locking bolts. It's a simple, effective theft deterrent. Keep your wheels where they belong – on your car!