OCGIG Countersink Chamfer Tool - High Speed Steel HSS (4241) 4pcs 2-5mm,5-10mm, 10-15 mm, 15-20mm

Material: High Speed Steel HSS (4241). Shank type: round, Sizes: 2-5mm,5-10mm, 10-15 mm, 15-20mm. Ideal for cutting through metal, wood and plastic (hardness <25 degrees). 90° 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