ITM Holemaker Spiral Step Drill Bits

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The Titanium Nitride coating significantly increases the tool life by providing the following benefits: Increased surface hardness to 85HRC. Ceramic surface, reducing friction by u p to 30%. Especially resistant to cold welding. Suitable for cutting a wide range of materials Variants Code Product Name Specifications SD4-20MM HOLEMAKER STEP DRILL SPIRAL FLUTE, 9 STEPS, 3MM STEP LENGTH, 4-20MM Sizes: 4, 6, 8, 10, 12, 14, 16, 18, 20mmStep Length: 3.0mmOverall Length: 74.5mmShank Diameter: 8mm SD5-25MM HOLEMAKER STEP DRILL SPIRAL FLUTE, 11 STEPS, 3MM STEP LENGTH, 5-25MM Sizes: 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25mmStep Length: 3.0mmOverall Length: 83.0mmShank Diameter: 10mm SD6-30MM HOLEMAKER STEP DRILL SPIRAL FLUTE, 13 STEPS, 3MM STEP LENGTH, 6-30MM Sizes: 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30mmStep Length: 3.0mmOverall Length: 98.0mmShank Diameter: 12mm SD6-32MM HOLEMAKER STEP DRILL SPIRAL FLUTE, ELECTRICIANS SIZES, 3MM STEP LENGTH, 6-32MM Sizes: 6, 8, 10, 12, 14, 16, 18, 20, 22, 25, 28, 30, 32mmStep Length: 3.0mmOverall Length: 100.0mmShank Diameter: 10mm SD7-40.5MM HOLEMAKER STEP DRILL SPIRAL FLUTE, 13 STEPS VARIED STEP LENGTH, 7-40.5MM Sizes: 7, 10.5, 12.5, 14.5, 16.5, 18.5, 20.5, 23.5, 25.5, 30.5, 32.5, 38.5, 40.5mmStep Length: 3.0mmOverall Length: 115mmShank Diameter: 12mm SDL4-12MM HOLEMAKER STEP DRILL, SPIRAL FLUTE, 9 STEPS, 5.5MM STEP LENGTH, 4 - 12MM Sizes: 4, 5, 6, 7, 8, 9, 10, 11, 12mmStep Length: 5.5mmOverall Length: 63.6mmShank Diameter: 8mm SDL6-38MM HOLEMAKER STEP DRILL, SPIRAL FLUTE, 12 STEPS, 6MM STEP LENGTH, 6 - 38MM Sizes: 6, 9, 13, 16, 19, 21, 23, 26, 29, 32, 35, 38mmStep Length: 5.5mmOverall Length: 101mmShank Diameter: 12mm SDXL4-12MM HOLEMAKER STEP DRILL, SPIRAL FLUTE, 5 STEPS, 8MM STEP LENGTH, 4 - 12MM Sizes: 4, 6, 8, 10, 12mmStep Length: 8.0mmOverall Length: 64.0mmShank Diameter: 8mm Show more