5.5 mm Ball End Hex L-Key

• High Leverage – We designed the keys to be longer in the largest sizes to increase leverage where it matters • Tight Fit with Fasteners – We precisely manufacture our hex key geometry on the large end of the applicable range, resulting in less slop in fasteners • 20-Degree Ball Angle Increases Access – Our L-keys implement a steep ball-end angle that increases your ability to access fasteners while still maintaining sufficient strength • Maximum Torque Strength – We make our L-keys with 8660 nickel chromium molybdenum steel that's heat-treated to HRC 54-58 to produce tools that are hard, but not brittle; as a result, the maximum torque of the L-keys consistently exceeds the ASME standards for minimum torsion load and the ISO standards for minimum proof torque • Clear Markings – With the exception of the smallest sizes, Tekton L-key sizes are marked in two ways–both with a high-visibility laser marking and a stamped marking (sizes 0.050 inch and 1.3 mm are too small to laser mark, sizes 0.050 inch, 1/16 inch, 5/64 inch, 1.3 mm, 1.5 mm, and 2 mm are too small to stamp)
Tekton L-Keys are made with 8660 nickel chromium molybdenum steel that's heat-treated to HRC 54-58 to produce tools that are hard, but not brittle. As a result, the maximum torque of the L-keys consistently exceeds the ASME standards for minimum torsion load and the ISO standards for minimum proof torque. The L-keys are coated with a durable manganese phosphate finish that’s resistant to corrosion. With the exception of the smallest sizes, L-key sizes are marked in two ways–both with a high-visibility laser marking and a stamped marking.