Locking chuck has small wear: Lock the drill chuck, low wear and tear, and it is not easy to drop the drill to solve the problem in your work. Professional performance electric hammer: strong power, brushless motor, stable cylinder, continuous work. One-piece stable cylinder, stable body. Wireless and convenient; light and powerful, longer life. Battery: Long-lasting power, fast charging, escort your long-term work. The body heats up quickly to be more durable. Pure copper brushless motor: rejects burning machine, high temperature resistant pure copper wire; precise speed and low noise.Multi-purpose machine: wall penetration, wood drilling, concrete breaking… Function four in one: Electric drill mode: ordinary drilling, easy. Electric hammer mode: Drilling efficiency, comparable to AC hammer. Tuning function: Install the flat shovel accessory and adjust the direction of the shovel head. Electric pick-up mode:water and electricity slotting, handy. Unloading one step, easy and fast.