About this article: ��Upgrade Handle�� Our rotary hammer with a unique concavo-convex function provides more resistance, exerts maximum control over your work to avoid unnecessary bloodbath, and prevents you from getting tired or exhausted right from the start of your work. ��850 W pure copper motor�� Produce variable speed from 0 to 3000 RPM to meet different needs, increase work output by 30% and increase durability when drilling and crushing brick, wood, steel, Concrete, masonry, walls and other hard materials. Also reduce the loading damage by half. ��Lock the speed button and 2M cable�� The lock button allows you to lock the speed without holding the trigger all the time to avoid fatigue. 2M extended cable increases the convenience for projects that require longer working hours with a little more mobility. ��Hammer & Impact 2 in 1�� By switching the impact mechanism of a drill on and off according to your task, it not only has a drilling function, but also acts as a hammer drill