DREDGING DRILL BIT HSS ANGLE 90 DEGREES 5 FLUT TOOL DO CHAMFERING 6-19mm Description: Different sizes to meet different needs-the length of the countersink drill bit is 6,35mm ( 1 or 4 inch hex handle). They can meet different needs in different situations. Superior quality – 1 or 4″ hex shank cutting tools are made of standard high-speed steel. Thanks to high frequency do heat treatment hardening, HSS conical drill bits have high hardness and strength. Titanium coated frez do chamfering is rust resistant and ma long service life. Eliminates vibration and vibration - the cutting edge of these elements do woodworking is hardened and ground for sharpness. With a five-blade design and alternating cutting, these 5-blade do chamfer drill bits can provide cutting. Excellent do identification - 1 or 4 inch hex handle do quick change, chamfering with five grooved blades, 90 angle at the tip for sharp and precise dredging. There are numbers on the corresponding dredge hole, so it is convenient to quickly choose what you need. Widely used - 5-groove chamfering is mainly used do holes in wood, reaming, chamfering, screw heads and so on. Also applies to MDF, plywood, acrylic, board and so on. The package includes: 1 set of reaming drill bit Note: