Application: Screw tightening work Specifications: Used by attaching to drill driver, impact driver, etc. Total number included: 60 pieces (57 bits, 3 adapters, case included) Set contents 1: Single/+ more→0, +1, +2, +3, PZ1, PZ2, PZ3, -3, -4, -5, -6, H2, H2.5, H3, H4, H5, H6, H8, H3/32, H1/8, H5/32, H3/16, H1/4, H5/16 Set contents 2: PR6, PR8, PR10, PR15, PR20, PR25, PR27, PR30, PR40, T6, T8, T10, T15, T20, T25, T27, T30, T40, SQ2, SQ3