Item Name: Cobalt Drill Bit Set Spiral Screw Metric Composite Drill Bit Tap Twist drill. Product Description 6pcs/set Cobalt Drill Bit Set Spiral Screw Metric Composite Tap Drill Bit Tap Twist drill bit set multi-function metal speciaFeatures:100% brand new and high qualitySuitable for drilling and cut grooving on thin wood plate, aluminum alloy, plastic boardHigh-speed steel material drill bits can be stable and durableEasy to install, suitable for most of electric drillDrilling need matching with cooling liquid, cooling liquid not includedSuitable for Cutting Hard Metal such as Stainless Steel, Steel and Cast Iron as well as Wood, Aluminum Alloy, and Other Softer Metals, including tiles, concrete, tiles, bricks, wood, plastic, glass, masonry and more.The product has sharp edges and high drilling efficiency. The center of the product has sharp serrations, and with its help, the drill can continue to drill horizontally after drillinSpecification:Material: High-Speed Steel+Titanium PlatingApplication: Woodworking, Aluminum Alloy, Plastic Board Drilling And Cut GroovingQuantity: 6pcsDiameter: 3, 4, 5, 6, 6.5, 8mm(1 Set)