BMWOOD CK100/S2 3.75″ 4-Jaw Key Chuck with Dovetail Jaws, Step Jaws, Wide Jaws, Pin jaws, Aquare Key, Hex Key, Wood Screw, Two Nylon Rings in Black Box Thread 1″X8TPI for Woodturning Lathe. Included Components 3.75″ 4-Jaw Key Chuck, Dovetail Jaws, Step Jaws, Wide Jaws, Pin jaws, Aquare Key, Hex Key, Wood Screw, Two Nylon Rings.