Wera Tools - Bit-Box 15 Impaktor PHHigh quality bits for Phillips screws in a practical Bit Box. The Impaktor technology ensures above average service life even under very demanding circumstances. The enhanced friction resistance from the rough diamond particle coating on the tip of the bit prevents any slipping out of the screw head. Particularly suitable for use with customary impact drivers; 1 4"" hex, appropriate for holders as per DIN ISO 1173 D 6. 3. Come with ""Take it easy""