TEKTON 0.028-3/8 in., 0.7-10 mm Hex Key Wrench Set (30-Piece)

Fit and Finish: Precisely sized ends are chamfered to slide easily into fastener, reducing wear on the wrench and damage to fastener head. Rather than layers of plating, the steel surface of each wrench is directly treated with a black oxide finish. Since this finish can't flake or chip off, it won't damage your work or diminish the precise fit in fasteners over time. Reach and Leverage: The versatile long arm/short arm design of these L-shaped wrenches offers extended reach on one end and extra leverage on the other. Positive Identification: For fast and sure identification of each series, inch sizes are long pattern and metric sizes are short pattern. This is especially effective for the smallest wrenches where individual size markings are not practical. Organized Storage: The unique hinged storage case opens flat, making it easier to get wrenches in and out. Easy-to-read size markings allow for fast wrench selection.