Wera 05057688001 8767 9 impaktor bit check 10 piece set wera 05057688001 this set from wera includes 1 impaktor bit holder with retaining ring and a ring magnet in the chuck which ensures a snug fit of bits in the holder plus 9 diamond coated torx bits impaktor technology makes this tool particularly suitable for use with conventional impact drivers the magnet makes it easier to handle longer and heavier screws and is ideal for overhead workwera 05057688001 8767 9 impaktor bit check 10 p