Shopping Cart (0) All Categories > Chuck Jaws & Accessories > Square Serrated Master Keys > Item # 12MK All CategoriesAll Categories Chuck Jaws & AccessoriesChuck Jaws & Accessories Square Serrated Master KeysSquare Serrated Master Keys Item # 12MK Item # 12MK, Square Serrated Master Keys 12MKSquare Serrated Master Keys Email This Page Download PDF Download PDF Printable Page List Price $52.00 Qty. Order /Asset/SQUARE-SERRATED-MASTER-KEY.png /Asset/SQUARE-SERRATED-MASTER-KEY.png Close Window Unit of Measure Imperial Metric Both Specifications Chuck Size N/A 10-12 in250-315 mm A Width N/A 0.993 in25.2 mm B Height N/A 0.50 in12.7 mm C Length N/A 1.69 in42.9 mm H Bolt Size N/A 5/16 N Depth N/A 0.13 in3.3 mm O Pitch N/A 0.25 in6.4 mm Material N/A 4140 Steel