Features and Benefits: * Measures disc brakes and up to 12 on brake drums * Includes set of clamps; 4 sets of set screws; 1 Allen wrench; 1 set of 3-3/4 contact points; 1 set of 3/4 cone contact points and 1 set of 3/4 flat contact points in plastic tube * When measuring brake drums only, add 8 to measurement allows for long cone and jaw widths * For use with 6 and 8 calipers