Wera 05057665001 867/4 IMP DC DIY 1/4'' Hex Impaktor Torx Power Drive Bits are high quality bits for recessed Torx screws. Wera 867/4 IMP DC DIY 1/4'' Hex Impaktor Torx Power Drive Bits are designed with Wera's Impaktor technology that offers an above-average service life even under extreme circumstances. Wera 867/4 IMP DC DIY 1/4'' Hex Impaktor Torx Power Drive Bits feature an enhanced friction resistance due to the rough diamond-particle coating on the bit tip which prevents any slipping out of the screw head. Wera 867/4 IMP DC DIY 1/4'' Hex Impaktor Torx Power Drive Bits are particularly suitable for use with customary impact drivers and are suitable for holders as per DIN ISO 1173-F 6.3.