Speed up your lathe operations with a quick-change tool post set. The G5689 Quick-Change Tool Post Set allows you to enjoy the convenience of easy tool set-up on lathes with up to 10 of swing. The set has been case-hardened and coated with a black oxide finish for long life and repeatable accuracy. This tool post features a piston type mechanism and comes with five tool holders. All milled surfaces are hardened and precision ground for repeatable accuracy. The turning holders accept 3/16″-1/2″ tool bits. The parting tool holders accepts 1/2 bevel or T-cut parting tools. The boring bar holder accepts 5/8″ and 3/4″ boring bars. The turning/boring holder accepts 7/16″ shank and 3/16″-1/2 tool bits. Lathe size: 10 Swing. Note: Each set comes with a blank T-nut which requires machining to fit your lathe.