KROST 6 Piece 3 Flute 90 Degree Edge Chamfer Cutter Mill Drill Bit Set, HSS 4241 High Speed Steel Countersink Drill Bits, Titanium Plating Process Perfect for Woodworking Carpenter

Material: Others, Color: bronze Item Dimension: 150 x 75 x 50 cm No Warranty 6 Pcs 3 Flute 90 Degree HSS Chamfering End Mill Cutter Titanium Nitride Coated HSS Countersink Drill Bit Set The countersink drill bits are made of 4241 high speed steel and super hard titanium coated, and the cutting edge is hardened and honed for sharpness 1/4 inch quick change hex shank, five-blade chamfering with a groove, 90 ° angle on the point for sharp and precise countersinking The whole drill bits is using high-frequency quenching for heat treatment, high-density grinding, with titanium to prevent rust. High hardness, good toughness Titanium three edge chamfering. It is suitable for Using in hardness 25 ° below the workpiece, such as carbon steel, sheet iron, insulation board