Hex Key Master Set HK-Pro (22-Piece)

The HK-Pro is the ultimate hex key set for professional technicians who work across both metric and SAE fasteners daily. This 22-piece master set combines the HK-Metric (9 keys) and HK-Inch (12 keys) ranges plus a 1.27mm ultra-micro key, all in S2 tool steel with an electroless nickel plating that provides superior corrosion resistance compared to black oxide — critical in humid, marine, or chemical environments. Each key features a ball-end on the long arm (allowing fastener access at up to 25 degrees off-axis) and a precision flat end on the short arm for final torquing. The color-coded sleeves follow the international standard: red for SAE, blue for metric. The set is housed in a premium foam-lined aluminum case with individual cutouts for each key, making missing-tool identification instant.