All critical tool holder surfaces precision ground Made from alloy steel hardened to 54 - 56rc Gage length is 3.0 inches Body diameter of chuck is 1.5 Inches Rear thread for pull stud is 5/8-11 APU13 Range .0156-.5000 (1/16" -1/2") APU16 Range .1250-.6250 (1/8" -5/8") Wrench included Not coolant thru capable Lockhart Precision Part# LP-CAT40-Drill-Chucks
