GearWrench 21 Piece 3/8 Inch Drive Pass-Thru 6 Point SAE/Metric Tool SetGearWrench 21 Piece 3 8 Inch Drive Pass Thru 6 Point SAE Metric Tool SetFeatures and Benefits: Fine tooth 5? ratchet handle "Pass through" socket system eliminates the need for deep sockets The GearRatchet handle quickly converts to a conventional 1 4" or 3 8" ratchet for standard sockets by using the two included adapters The Vortex thin wall socket design has the same torque strength as an ordinary socket The unique gear ratchet drive configuration