Used for fast, easy alignment of clutch plates. Bushing range- import- 12 to 12.7 mm., 15.8 to 16 mm., 17.4 to 18 mm., 21 to 22.2 mm. Domestic- 0.561 in. to 0.590 in., 0.749 in. to 0.787 in. 0.812 in. to 0.874 in., 0.984 to 1.181 in. for use on most domestic and import cars.