This standard specifies the types of solid wrenches, ring wrenches, and dual-purpose wrenches. This standard applies to the solid wrench, ring wrench, and combination wrench specified in GB/T 4625 (numbered 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14).
GB/T 4388-1995 history
2008GB/T 4388-2008 Types of open-end wrenches,box wrenches and combination wrenches
1995GB/T 4388-1995 Types of open-end wrenches, box wrenches and combination wrenches