Holemaker Step Drill Spiral Flute 7-40.5mm

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: 7, 10.5, 12.5, 14.5, 16.5, 18.5, 20.5, 23.5, 25.5, 30.5, 32.5, 38.5, 40.5mm Step Length: 3.0mm Overall Length: 115mm Shank: 12mm