Holemaker Step Drill Straight Flute 4-20mm

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 6 8 10 12 14 16 18 20mm Step Length: 4.0mm Overall Length: 75.0mm Shank: 8mm