Products Description:1.Suit for use in hardness under 28°artifacts,The plate thickness under 5mm of iron, aluminum,mild steel ,PVC,wood,PMMA2.You can use water to cooling it when it is work and it can be used for even longer3.You can use one drill for diferent aperture4.Better to use center punch drill hole when you drill big size hole .5.Recommend the drilling speed of 250--400 rpmProducts Feature:1.Hex Shank quick change and release, can be used in any drill or drill press2.Compared with the ordinary twist drill,it is not easy to break and it can be used for deburring, chamfering and open hole3.Laser marked sizes won't wear off with use4.Drop forged, heat-treated high speed steel with titanium coated for added strength and durability5.Spiral Flute design, better for faster drilling, prevent slippage when in chuckMaintenance:using antirust oil in metal surface and keep in box after drilling to avoid rusting
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