Holemaker 3pc Straight Flute Step Drill Set-4-30mm

STRAIGHT FLUTE STEP DRILL SET • 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. **Will cut Stainless Steel however Stainless will reduce the edge life of your cutting tool. Set Contents Listed Below Part No. Size min-max Quantity SDST4-12MM 4 -12MM 1 SDST5-25MM 5 - 25MM 1 SDST6-30MM 6 - 30MM 1