• High Leverage – We designed these L-keys to be longer in the largest sizes to increase leverage where it matters • Tight Tolerances – 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 • Corrosion-Resistant – We coat all of our keys with a durable manganese phosphate finish that’s resistant to corrosion • Clear Markings – Tekton L-key sizes are marked in two ways, with a high-visibility laser marking and a stamped marking
Tekton's flat end L-keys cover a range of large fastener sizes, including 7/16 to 3/4 inch and 11 to 19 mm. The keys are made from 6150 that's heat-treated to 44-50 HRC and coated with a highly corrosion-resistant manganese phosphate finish. We tightly control the tolerances of our keys and chamfer the edges for a refined tool that provides you with a proper, snug fit every time.