1,Different types of drill bits are available for different electric drills, all kinds of soft and hard wood can be opened2,The thread is very deep, the deeper the head thread is, the faster the firewood is.3,U-shaped anti-skid thread high-frequency quenching continuous tip heat treatment of the drill bit, our drill bit uses high-frequency quenching heat treatment, which not only ensures the hardness of the drill bit, but also ensures the durability.4,The wood splitting drill is not efficient for splitting all wood. If it is large or hard wood, it should be separated from the edge of the wood, and the wood should be split little by little several times.5,Good after-sales service, if you have any questions or suggestions about our products or services, I hope you can communicate with us as soon as possible, our professional customer service will solve the problem for you in detail.