851/1 IMP DC PH DIY Impaktor PH bits, PH 2 x 25 mm, 10 pieces 10x 851/1 IMP DC Impaktor bits: PH 2 x 25 mmHigh quality bits for Phillips screws. The Impaktor technology offers an above-average service life even under extreme circumstances. Enhanced friction resistance, thanks to the rough diamond-particle coating on the bit tip, prevents any slipping ou