Product Overview 60° PULL STUD FOR BT CHUCK Non Coolant Thru'. Metric Thread Item(s) 1 Pc. 60° BT Retention Knob Specification Non-Coolant Through High Grade 1065 Carbon Steel Hardened & Precision Ground Available as BT30 With M12 Thread, BT40 Witk M16 Thread, BT50 With M24 Thread Product Photos