The Rivolver set of wood lathe spur centers is an excellent choice for users doing a lot of different spindle or smaller diameter work where a lathe chuck would be cumbersome. The main adaptor is 1" x 8 TPI (other sizes available) and the set includes crown centers in 5/8", 1" and 1.5" in diameter as well as 4-prong drives also in 5/8", 1" and 1.5" in diameter. There are two pin wrenches included to make changeover of the spurs a simple task. With this kit you will always have the right spur center for the job.