Applicable Scope: 1mm - 16., 5mm , Best chamfering effect Chamfer Cutter Head Countersunk Head Knife BC1041 BC1651 BC8301 BC6301 Countersink Deburring Tool Deburring Tool - Chamfer Cutter - Countersunk Head BC6301/BC8301/BC1041 Deburring Countersink The blades and countersinks are easy to change and are all tailored to different materials and applications. Rotatable deburring countersinks for general work on bores made of various materials. The deburring countersink is used with a corresponding holder in manual application Special chamfering for round hole Get precise and accurate deburring and countersinking with the Noga BC1651 HSS Right-Handed Cranked RotoDrive Deburring Countersink Blade. Made of high-speed steel, this versatile tool is perfect for metalworking, woodworking, and DIY projects BC1651: 16., 5mm crancked RotoDrive countersink., Blade Material: H., S.