Cool Baby Masonry Drill Bits - Cross Carbide Tipped 7Pcs 3/4/5/6/8/10/12mm

【High-quality materials】Drill bit is made of high-quality alloy, which keep the hardness and sharpness longer than traditional steel bits, can easily puncture various materials. 【Reinforced U-Type Groove】The cement drill bits have special U groove drill design chip removal smoothly, fast penetration, improve drilling efficiency. 【Hexagonal handle】Hex Shank allows drill bit easy plug and to be held tightly. Prevent tremor, make the drill bit more firm, and let you work safely. 【FEATURES】 1.Cross drill bit is sharper and more efficient with positioning function. 2.These drill bits can work with less skating and shaking which can help you to finish your job accurately. 3.The surface of the drill bit becomes smooth after polishing. 4.Can use with bench drill, hand drill and other drilling machine. 【SAFETY TIPS】 1.Universal handle for common drill, electric drill, hand drill and bench drill, NOT fit for impact drills. 2.Please change position when there is reinforced concrete ahead, otherwise drilling on it will damage the drilling edge. 3.For fragile items, the drilling speed should not be too high, and the pressure should not be too high, so as not to damage the items. 4.This product cannot be used for drilling tempered glass and pure concrete. 5.When drilling, use only flat drill function, do not use any impact force. 6.Please spray water on the bit to keep it cool when drilling the hard material. 【Size】3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm