COLDfire®
is a special method of hardening that makes the metal stronger, harder and more durable. This cryogenic
the process is a one-time permanent treatment affecting the entire screw bit, not just the surface
layer. The cryogenic process consists of two steps, first the bit is hardened by heating to 870° and then frozen
to -148° using a dry nitrogen atmosphere. The result of this process is an exceptionally durable bit
zz 40% stronger – bit tips retain their shape and withstand higher torque
zz 45% longer service life – after the end of the bit service life, you can still expect 45% more attached screws