High hardness, offer superior cutting power and durable. Quickly and accurately drill a smooth hole. Better in centring and no skid. Five-edged chamfer design will fast discharge chips from the hole on both sides automatically.
Screw starter with countersink can control the depth of the hole by L-wrench, and control the width of the hole by changing drill of different diameter.
Easy to use the combination of the hex key to adjust or disassemble the countersink drill bit and the five-flutes chamfering. The woodworking chamfer drill bit set is suitable for most power drill such as bench drill, hammer drill and so on.
The adjustable stop collar allows you to either set the screw head flush with the surface or drill a countersunk hole to accept a plug or button: 3 / 8″ for #5 – #9; 7 / 16″ for #10; 1 / 2″ for #12.