Holemaker Step Drill Straight Flute 4-12mm

STRAIGHT 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: 4 5 6 7 8 9 10 11 12mm Step Length: 3.75mm Overall Length: 65.5mm Shank: 6mm