Square Replacement Carbide Cutter for Simple Wood turning Tools Mid Size or Simple Start Rougher (MSR or SSR) Available in 90 degree square, square with 2" radius, or a package of 2 which includes 1 of each. 90 degree square cutter is 10.5 mm x 10.5 mm with square very sharp corners. 2" Radius square cutter is 11mm x 11mm with corners rounded approximate 0.02" radius. Screw required is flat head cap screw - 4/40 x 5/16 length - Head Torx T10 Replacement carbide cutters for Mid Size or Simple Start Rougher (tools engraved with MSR or SSR). Three cutter options to choose from: OPTION #1: 90° square carbide cutter. Corners are very sharp with no radius. Size: 10.5 mm x 10.5 mm Best choice for turning perfect 90 degree shapes such as inside corners and tenons. OPTION #2: 2" Radius square carbide cutter. Corners rounded with an approximate 0.02" radius. Size: 11 mmx 11 mm. Best choice for roughing and cutting straight surfaces. OPTION #3: Package of 2 cutters which includes one of each of the above cutters. Screw required: Flat head socket cap screw - 4/40 x 5/16 length - Head Torx T15. NOTE: This cutter will NOT fit the full size tools.