Step Drill Bit Set by Volterin, Cone Titanium Coated High Speed Steel | 3-Piece Set with Pouch | 3-12mm/4-12mm/ 4-20mm Multi-Functional Industrial DIY Metalworking (3PC (Fractional Box)) - Product Features
- TITANIUM | HIGH SPEED STEEL: Classic High Speed Steel With Titanium Coating For Proven Capability and Durability
- TRI-FLATTED SHANK: Fits Into Power Tools Chuck Securely and Eliminates Slip
- SPLIT POINT TIP: Increases Cutting Speed With Self-Centering And Prevents Walking
- Drilling Holes In: Plastic, Aluminum, Copper, Stainless Steel and Many Other Types Of Sheet Metal (the board must be smaller in thickness than the height of step drill bits)
- TWO-FLUTE DESIGN: Clears Chips Faster and Allows Particles To Escape Easily, Smooth Cutting