For fast, easy alignment of clutch plates. Complete set offers both SAE & Metric applications to service most cars and light trucks. Features all-steel construction and includes 8-1/2" (216mm) center shaft, tapered cone and 8 bushing sizes: 12/12.7mm, 15.8mm/16mm , 17.4mm/18mm , 21mm/22mm , . 561''/. 59 , . 75''/ . 187'' , . 812''/ . 874'' , .984''/1.181''.