This is a part number for a Wera screwdriver bit set. The set includes 8 double-headed bits, with a total of 16 bits, for use with Wera screwdrivers and bit holders. The bits are made from Wera’s patented hardening technology and feature an optimized shape for increased torque during use. The set includes PH1, PH2, PH3, PZ1, PZ2, PZ3, SL5.5 and SL6.5 size bits.