Wera 851/1 PH Impaktor Phillips Screwdriver Bits

This variant is the Wera 851/4 PH Impaktor bit in PH3, 50mm, supplied in a pack of 5. Combining the larger PH3 profile with an extended 50mm length, this bit is built for heavy-duty applications requiring both a larger drive profile and greater reach — ideal for structural work, large-format assembly, and deep countersunk or recessed fixings. Wera's Impaktor technology is engineered to absorb and redistribute the intense shock forces produced by impact drivers, significantly extending service life compared to standard bits. The rough diamond-particle coating on the tip bites firmly into the screw head, eliminating cam-out and keeping drives clean and controlled even under heavy load. Colour-coded for quick, on-site identification by profile and size.