ITEM NAME:3PC1/4 Hex 5Flute 12-19mm Countersink Drill Bit for Wood Metal Quick Change #JT1 Product Description Description: 3PCS 1/4 Hex 5 Flute 12-19mm Countersink Drill Bit for Wood Metal Quick Change Description: 100% brand new and high quality. 1. Five Flute Chamfer Debur Countersink. 2. 5 Flute Counter Sinks. 3. Carpentry Countersink Drill Bit Set. 4. Suitable for all Woods and Soft Metals. Features: Material: high carbon steel size:12mm 16mm 19mm Shank diameter: 6.35mm (1/4 inch hex shank) Surface treatment: blackening treatment Heat treatment: high frequency quenching, enhance the hardness. Applicable scope:suitable for wood plastic cutting chamfering etc. angle:90 degree Included: 3pcs Countersink Drill Bit Set Chamfer woodworking Chamfering drill..Five Flute Chamfer Debur Countersink. Included: 3pcs Countersink Drill Bit Set Chamfer woodworking Chamfering drill. Carpentry Countersink Drill Bit Set. size:12mm 16mm 19mm. 5 Flute Counter Sinks.