Wera Impact-rated PH2 (x 25mm) bits with diamond coating in a practical Bit-Box The Wera Bit-Box 15 Impaktor set delivers high-performance PH2 Phillips bits built for extreme demands. Designed specifically for use with high-torque impact drivers, these 25 mm bits are optimized for maximum durability, grip, and bit retention. Whether you're driving screws into tough materials or working overhead, this set keeps you productive and in control. Engineered for high torque and long life Thanks to Wera’s Impaktor technology and specialized bit geometry, these bits achieve above-average service life even under continuous heavy-duty use. A reinforced torsion zone absorbs peak loads and protects the tip from premature breakage. The diamond-coated tip increases friction in the screw head, reducing slippage and lowering the need for excessive pressure during use. Each bit is color-coded with Wera’s 'Take it easy' tool finder for quick identification. The compact Bit-Box provides safe, organized