4 mm Hex and Triple Square Bit Set with Rail, 12-Piece (0.028 - 5 and 32 in., M3 - M4) Quantity:1 Each wrench is engraved with

Each wrench is engraved with a unique serial number that corresponds to its certificate of calibration

External Thread: 1-3/8"-12

The 6-point socket opening provides an exact fit and maximum contact for hex fasteners

Internal Diameter: 3/4"-16

designed as ultimate access tools that can fit into tight spaces where others can't

4 mm Hex and Triple Square Bit Set with Rail, 12-Piece (0.028 - 5 and 32 in., M3 - M4) Quantity:1 Each wrench is engraved withPrecise Tip Geometry Our 4 mm bits are made with tight tolerances for a secure fit in small screws, reducing slip and wearcrucial for high value, sensitive electronics Corrosion Resistant The bits are made from hardened steel and finished with a zinc phosphate conversion coating that provides lasting corrosion resistance without altering dimensions or flaking, unlike chrome finishes Clear Markings The tip size and Tekton "T" are clearly stamped onto