3/8" hand sockets are common for home DIY, automobile and motorcycle maintenance. The torque value is between 1/4" and 1/2" sockets. In the application of automobile and motorcycle, comparing with 1/2" sockets, the size and length of the 3/8" sockets are smaller, so it is more convenient to use in the narrow space. The common sockets are 6-point and 12-point and deep sockets. The Metric sizes range from 6mm to 24mm, and the SAE sizes range from 1/4" to 5/16"; In addition, there are Spline sockets and BIT sockets.