DORMERR4583.9R458 Series Solid Carbide Twist Drill Bit, 3.9mm Diameter, 66 mm Overall

The Dormer Force X short drill bit is a high performance drill bit. This drill bit able to produce high quality and accurate holes at high speeds and feeds. This drill bit has self centring 140 degree, 4 facet split point and CTW flute construction for enhanced penetration rates. Titanium aluminium nitride coating increases surface hardness and improves tool life.

DIN 6535 HA cylindrical shank

Supports DIN 6537K standards

Continuously thinned web flute design

3xD Usable tool depth to diameter ratio

M7 Industry standard tool tolerance zone