Offset 5/16; Insert Style RCMT-1204 , Screw M4x10 Seco Tools 00071928 | SRDCN-16-12 25.00mm Maximum Cutting Depth X 152 40mm Functional Length X 18 69mm Functional Width X 90 Degree Cutting Edge Angle Indexable Turning Toolholder 5/8 Inch Shank Tool Holder Hhip SRDCN 10-12B Turning Tool Holder 2037-1612 5/8 Shank Tool Holder Online shopping for Turning Holders - Indexable Insert Holders from a great selection at Industrial & Scientific Store ~ For use with RCMT-1204 inserts., ~ Shank is 5/8 X 5/8. STYLE SRDCN 16-12E **5/8 SHANK** TURNING TOOL HOLDER HOLDS RC_T1204 INSERT - ID: 20286-2037-1612. 3/8, 1/2, 5/8 Inch Shank Dia. SRDCNR SRDCN 10-12B Turning Tool Holder ~ 0-Degree lead angle., ~ 7° relief.