Tekton Flat End Hex L-Key Set With Racks, 15 Pieces, 7/16-3/4 Inch, 11-19 Mm

High Leverage – We designed these L-keys to be longer to increase leverage when it matters Two Measures of Tolerance Control – We measure our hex key tolerances in two ways, from point-to-point and side-to-side, to ensure the highest standards of dimensional accuracy and consistency 6150 Steel – We make our keys with 6150 chromium vanadium steel that's heat-treated to 44–50 HRC to produce tools that are hard, but not brittle