Wera Series 1 851/1 BDC SB Diamond Coated Bit, Phillips PH 2 (Pack of 5) Features BiTorsion design with diamond coating, for Phillips screws, in clamshell packaging, PH 2 x 1/4" drive In clamshell packaging For Fein, Bosch, Holz-Her, Metabo, and Lecurex hexagon drives Wera's diamond coating ensures that the tool is securely positioned, with the tip literally biting into the screw Limited Lifetime Warranty, German Engineered