How many specifications are there for wrenches?

Spanner is mainly divided into open spanner and manual spanner:

1, commonly used open spanner specifications -- corresponding screw thread specifications: 7, 8, 10, 14, 17, 19, 22, 24, 27, 30, 32, 36, 41, 46, 55, 65; The corresponding thread specifications are M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M36, M42.

2, manual wrench, mainly divided into single-head wrench, double-head wrench, adjustable wrench, spanner, multi-purpose wrench, percussion wrench, socket wrench, socket driver, torque wrench, torque wrench, cross wrench, ratchet wrench, hook wrench, hexagon wrench, wrench, wrench.

Manual clutch torque wrench, pipe wrench, t-wrench, l-wrench, three-fork wrench, crescent wrench, oil drum wrench, tire wrench, spark plug wrench, filter wrench, combination wrench, other wrenches, etc. Torque wrench is divided into sound wrench, pointer wrench, digital display wrench.