Complete Models of Four-Prong Socket Sets

[ZacharyLee]

Four-prong socket wrenches come in three specifications: 1/4 inch, 3/8 inch, and 1/2 inch. 1 inch equals 25.4MM. Socket wrench classifications: 1. By size (referring to the size of the square drive): 1/4", 3/8", and 1/2" three specifications. " denotes inches, where 1" equals 25.4MM. 2. By length: long socket, short socket, E-type socket. 3. By edges: 6-point, 12-point, 4-point. 4. By appearance: single groove and double groove; knurled; straight barrel; nickel-plated and chrome-plated, etc. 5. By usage: manual socket wrenches and pneumatic socket wrenches (black, chrome-molybdenum steel). 6. By screw type: external hex socket, external Torx socket; internal hex socket, internal hexalobular socket, internal 12-point socket; E-type socket, five-point press-fit socket, five-point hollow press-fit socket, four-point socket, etc.