Beall 1-1/4" Collet Chuck Set Threaded to accept a 1-1/4"-8 lathe spindle 5 collets in 1/8" increments: 1/4", 3/8", 1/2", 5/8", and 3/4 Designed to hold small parts safely and accurately in a lathe without marring Collets hold so securely that the included spanner wrenches are usually unnecessary