Item type: Wood Drill Bits

Material: high speed steel(4241)
Quantity : 4pcs
Size:15*13*4cm(5.91*5.12*1.57in)
Color:silver
1. The drill is made of industrial grade high speed steel, titanium plated surface, wear-resistance, long service life.
2.90° Angle counterpoint for sharp precision countersink, for the workpiece round aperture chamfer or cone hole
3. Handle type: round, size :2-5mm,5-10mm, 10-15 mm, 15-20mm
4. The drill should be used with a bench drill, the use of hand drill is easy to shake, affecting the chamfering effect
5. Drill can be used to cut metal, wood and plastic (hardness

Pilot Hole
First drill the hole in wood or plastic to locate or guide a screw and expand the size according to the tap. Without a pilot hole, the screw may get too tight and either broke the material or snap the screw completely.
Countersink
Install the chamfer drill on the bench drill. If you need to chamfer 16mm hole, you can choose 15-20mm chamfering device. Add water or cutting oil to cool when chamfering.
Clearance Hole
Finally screw on until flush with the horizontal. 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.