SP Air Corporation’s SP-7770 unit is a 3/8″ ‘mini’ rotational head ratchet wrench. Its compact head design allows access into confined areas that would normally need to be fastened by hand. The SP-7770 is excellent for under-dash, carburetor, body shop repair and light-duty work. The unit’s slide ring adjusts easily to provide you with the most comfortable head position in any situation. Unit specifications include a square drive of 1/4″ and bolt capcaity of 3/8″, a working torque range of 5-24 ft-lbs., a free speed of 220 rpm, a vibration level of 3.5 m/s, and a sound level of 82.7 dB