Handle: 1/4 hexagonal handle (mm).

Material: The drill part is high speed steel 4241 (applicable to hardness 25HRC the following workpieces, such as carbon steel, sheet iron plate, insulation board, PVC board, wood board, etc.). Black chamferer is made of carbon steel.

Packing note: OPP plastic bag.

Countersunk head specifications    corresponding to the diameter of the front drill bit

5#         1.98mm

6# 2.38mm

8# 2.78mm

10# 3.175mm

12# 3.56mm

the arrow in the above figure shows the three steps of woodworking countersunk head chamferer, with the following dimensions:

specification 1 size 2 size 3 size

6# 4.7mm 7.0mm 10mm

8# 4.7mm 7.0mm 10mm

10# 5.4mm 8.54mm 10mm

12# 6.0mm 9.0mm 10mm

function: you can drill the screw hole and the countersunk hole that holds screw cap at the same time and keep the two on the same axis. After screw tightening, screw cap is below the board plane!

Suitable for drilling machinery with Chuck or joint, suitable for drilling on hard wood and wood layer

this product has two kinds of drill bits: natural color and titanium plating.