Holemaker Step Drill Spiral Flute 4-20mm

SPIRAL FLUTE STEP DRILLS
• The Titanium Nitride coating significantly increases thetool 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 20mmStep Length: 3.0mmOverall Length: 74.5mmShank: 8mm