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The Irwin 11105 is a step drill that produces progressive hole sizes from 5 mm to 35 mm using 2â3 mm ascending steps. Constructed from molybdenum alloy steel and tempered to Rockwell HRC 62â64, it has an uncoated bright finish and spiral flute geometry with integrated deburring action. The tool includes a 3-flatted shank to reduce slipping and a self-starting SpeedPoint tip for improved penetration in thin materials.
Metric step drill 5â35 mm, molybdenum steel, HRC 62â64, SpeedPoint tip
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