The 3/4 in. socket line is for heavy mechanical work such as truck or industrial plant maintenance. The application ranges are as follows: Socket hex sizes: 27/32 in. to 2-5/16 in. and 19-60 mm. Torque applications for sockets, handles, and accessories: 6,00-18,000 lbs. For FOD (Foreign Object Debris) applications, the use of sockets with a blue finish is recommended so that no coating will flake off.