Wera 05057690001 bc30 impaktor bit check ph pz hex torx 30 piece set wera 05057690001 this set from wera includes 1 impaktor holder with retaining ring and ring magnet plus 20 diamond coated impaktor bits and 9 standard torsion bits these bits are particularly suitable for use with commercial impact wrenches the ring magnet means the holdercan be used easily with long or heavy screws and for overhead work wera 05057690001 bc30 impaktor bit check ph pz hex torx 30 piece set