1. Titanium Combination Drill taps are made of HSS 4341, which can ensure sharp, fast execution and retain strength and efficiency. The surface is treated with a titanium alloy, which greatly improves the cutting performance of the drill, is more wear-resistant and prolongs the service life.2. Titanium Combination Drill Tap Bit Set provides tapping, deburring and countersinking for a quick and complete job on copper, wood, brass, aluminum, sheet metal and plastic etc.3. So it has high versatility. Each tap drill is engraved with a label, which is convenient for you to choose the size that suits you. The convenient -inch (6.35mm) quick change hex has a tapered end to prevent excessive knocks. Back taper exceeds the tap to prevent over-drilling and damage to the thread.4. Storage case is lightweight and durable for easy storage and is portable for all job environmentsThis is a convenient hex tap drill set that can simultaneously complete hole drilling, tapping, deburring.It is not easy to shake and can drill accurately.: 1/4 inch Hex (quick change for cordless drill )Application: Suitable for drilling, tapping, cutting on light metal, aluminum plate, iron, etc.Colour: gold+silverMaterial: high-speed steelPackage Contents:2 x M3 x 0.5mm x 64mm Drill Bit1 x M4 x 0.7mm x 65mm Drill Bit1 x M5 x 0.8mm x 67mm Drill Bit1 x M6 x 1.0mm x 67mm Drill Bit1 x M8 x 1.25mm x 70mm Drill Bit1 x M10 x 1.5mm x 70mm Drill BitOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.