CME 6 3-Jaw Self-Centering (Scroll) Lathe Chuck, Front Mount, 2-Piece Inner Outer Reversible Jaws. 3-JAW 2-PIECE REVERSIBLE; Inner and Outer Jaws; American Standard Tongue and Groove Style; ISO3442. HIGHLY DURABLE; Steel inner mechanisms are quench hardened to increase toughness. PLAIN (FLAT) BACK FRONT MOUNT; Requires a fitted backing plate to mount to your lathe’s spindle or rotary table; CME fully finished backing plates are available. DIMENSIONS; 160mm Chuck Diameter; 45mm Through Hole Diameter; 130mm Back Recess Diameter; 142mm Mounting Diameter for Bolts; 5mm Back Recess Depth; 3mm – 55mm Internal Clamping Range; 55mm – 145mm External Clamping Range; 50mm – 160mm Jamming Range. WHAT’S INCLUDED; Lathe Chuck, Chuck Tightening Key, 3pcs M8 Mounting Bolts. We are always working hard to ensure your package arrives as soon as possible. We do not accept P. Please provide a physical address.