It is a special bit set with alternator combination wrenches for assembling the belt pulleys. It contains the following parts;

• Alternator combination wrench
• Spline Pulley Key, 15.0 mm, 33 teeth,
• Spline Pulley Key, 22.0 mm, 33 teeth,
• 22 mm Adaptor for Belt Pulley Wrench, 30 mm
• 17 mm Special Adaptor, 4 mm, 30 mm
• Bits, length 75 mm, external hexagon 10 mm (3/8") drive, internal hexagon H8 and H10 mm
• Bits, length 75 mm, external hexagon 10 mm (3/8") drive, internal serration M8 - M10
• Bits, length 75 mm, external hexagon 10 mm (3/8”) drive,
• T-Star (for Torx) T40 and T50
• Bit Socket for Generator, 12.5 mm (1/2"), internal serration (for XZN) M10
• Bit Socket for Generator, 12.5 mm (1/2"), T-Star (for Torx) T50
• Bit Adaptor with Retaining Ball, 12.5 mm (1/2") internal hexagon 10 mm (3/8")
• Including adaptor for VW, Audi, Seat, BMW, Mercedes, Ford