Buck 12" 3-Jaw ATSC Forged Steel Body Scroll ChuckChuck Model No. Ajust-Tru 3ATSC12 B8123 Serial No. C0363 This is a chuck that has never been used. 12" Diameter Chuck 4" Thick Body 4" Thru Hole 2300 RPM Max. Speed A-8 Mounting Plate .0005" TIR Repeatability .71" - 11.22" External Gripping Diameter 4.92" - 11.22" Internal Gripping Diameter 140 Lbs. Chuck Weight with Mounting Plate 175 Lbs. Shipping Weight Equipped With: American Standard Tongue & Groove Master Jaws (1) Set of New Hardened Reversible Top Jaws (1) Set of Used Hardened Reversible Top Jaws (1) Set of Aluminum Top Soft Jaws Spring Loaded T-Wrench Mounting Bolts Allen Wrenches Original Manual Original Box New Condition - Never Used