【Ultra Durable】: This product is made of very high quality and durable carbon steel. The blade is hard and sharp. It is durable and wear-resistant, can be used for a long time for your various kinds of renovation work in timber drilling. 【Excellent Design】: The high precision blade to increase grip, smooth cutting operation, no vibration, excellent impact resistance. The blade adopts arched design, with low cutting resistance, limited drilling speed and high working efficiency. The excellent design ensures that the hole is neat and smooth without any broken edges, and the chip will not stick around and can be easily removed. 【Easy to Use and Safe】: The drill bit can be easily installed on the drilling tool according to the instructions. After the confirmed fixation, you can start your work. The scientific cutting curve design ensures that the drill bit can work efficiently for a long time without any unnecessary burden on itself and the drilling tool. 【Application】: With the 8 kinds