2.75" chuck includes the 4 Jaw Key Self-Centering Chuck, Dovetail Jaws, Wood Screw, Two Nylon Washers, T Handle Allen Key. ATTENTION! This series of jaws are ONLY compatible with our BMWOOD brand's 2.75-inch chucks and CAN NOT be matched with other brand chucks on the market. PLEASE BE CAREFUL NOT TO PURCHASE THEM BY MISTAKE! The tightening mechanism provides additional grip strength to the workpiece. The dovetail jaw can expand with much greater gripping power with outside grip range from to inches and inside grip range from to inches. 1”x8 TPI thread is compatibile with the majority of wood lathes on the market. The Dovetail Jaws are suitable for gripping a recess or tenon prepared in your workpiece for clamping. The two nylon washers provide a small non-stick buffer between contacting metal surfaces without affecting mount accuracy. BMWOOD CK-G2.75 2.75" 4 Jaw Key Self-Centering Chuck, Thread 1"X8TPI, with Dovetail Jaws, Wood Screw, Two Nylon Washers, T Handle Allen Key for Woodturning Lathe.