OCGIG 4 Pcs Titanium Coated Countersink Chamfer Tool Deburring Tool Set Metal Wood Drill Bits Set

Material:HSS（High Speed Steel）4241, Titanium Coated Application:Ideal for cutting through metal,wood,plastic and thin iron plate (hardness <25 degrees) Chamfer range:2-5mm, 5-10mm, 10-15mm, 15-20mm, Shank diameter: 6mm, 8mm, 10mm, 12mm, Head diameter: 10mm, 14mm, 21mm, 28mm 90 Degree angle on the point for sharp and precise countersinking, used for workpiece circular aperture chamfering or cone hole This bits should use the bench drill , it is easy to shake and it will affect the chamfering effect if you use the hand drill