The Faithfull diamond coated bits have a coat of minute diamond particles at the tip of the bit that bite in to the screw head. This helps to prevent accidental slipping or cam out when screwdriving.
All are supplied in packs of 5 and are 25mm in length.
The Faithfull FAISBPZ1D diamond coated bits have the following specifications:
Pozi screwdriver bit: PZ1.