Purpose: For screwing and unscrewing screws with a suitable grip Set includes: ergonomic handle with 1/4″ HEX socket, 28 pieces of 1/4″ HEX bits for unscrewing 25mm long, adapter and 18 pieces of HEX bits Dimensions: socket 18pcs, TX 10pcs, PZ 4pcs, PH 4pcs, SL 5pcs, HEX 5pcs