Specification: -Screw head type: Universal round head -Item Type: Cobalt Drill Bits -Material: High-Speed Steel+Titanium Plating -Structure: Saw&Drill -Application: Woodworking, Aluminum Alloy, Plastic Board Drilling And -Cut Grooving -Quantity: 6pcs -Diameter: 3, 4, 5, 6, 6.5, 8mm(1 Set) -Detailed size: As shown -Usage Scenarios:Suitable for holing, cutting on wood, soft metal, aluminum plate, iron, etc. Package list: 6pcs drill bit Product Details 1. High-speed steel material: high hardness, good wear resistance and long service life 2. Sharp tooth mouth: easy to remove sawdust, sawing more smoothly 3. Universal crown design: no slippage. Suitable for electric drill bench drills 4. Multiple sizes: suitable for different scenarios