SPIRAL FLUTE STEP DRILLS • The Titanium Nitride coating significantly increases the tool life by providing the following benefits: • Increases surface hardness to 85HRC • Ceramic surface reducing friction by up to 30% • Especially resistant to cold welding. • Suitable for cutting a wide range of materials. Sizes Included: 5 7 9 11 13 15 17 19 21 23 25mm Step Length: 3.0mm Overall Length: 83.0mm Shank: 10mm
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