Bit holder Impact
HERMAN SB-91
¼" hex shank

The TorZon™ flexible torsion zone on the shaft reduces the pressure on the head of the bit holder:
the holder behaves like a strong spring when screwing and thus minimizes the possibility of its breakage even with very high torque impacts created when screwing with an impact driver

Increased hardness of the holder:
the result is very low wear and high strength, but despite the optimized heat treatment, a more fragile design. However, in combination with the flexible TorZon™ torsion zone, the tendency to break the bit is largely eliminated

One-handed quick change function:
just push the holder sleeve towards the shank - the inserted bit will automatically pop out - replace the bit with another one - release the holder sleeve - done. The bit is reliably held by a self-locking mechanism

With ¼" (6.35mm) hexagonal shank:
suitable for gripping with three-jaw chucks and compatible with all standard hexagonal bit holders (DIN ISO 1173-D 6.3)

Surface treatment / hardness:
black phosphated / HRC 59~60