Measures disc brakes and up to 16 in. on brake drums . When measuring brake drums only, add 8 in. to measurement . For use with 6 in. & 8 in. calipers. Furnished in shop hardened case. Caliper Not Included Includes set of clamps, 4 sets of set screws, 2 Allen wrench, 1 set of 3-3/4" contact points, 1 set of 3/4" cone contact points, 1 set of 3/4" flat contact points & 1 pair of 2" extensions in plastic tube.