For electric power tools, electric hammers are a type of electric drill used to drill holes in concrete, slabs, brick walls and stone. Professionally punch holes in the wall, concrete, stone, and multi-function electric hammer, adjust to the appropriate position with the appropriate drill bit can replace the ordinary electric drill, demolition hammer.Since the drill of the electric hammer generates a rapid reciprocating motion (frequent impact) along the direction of the electric drill rod while rotating, it can quickly punch holes in materials such as cement concrete and stone which are brittle. The high-grade impact drill can use the changeover switch to make the drill of the rotary hammer in different working states, that is, only the rotation does not impact, only the impact does not rotate, and both impact and rotation. Model HW0803 Input power 850W No-load speed 750rpm Impact rate 3700bpm Impact joules 3.5J Chuck Size SDS Plus Steel 13mm Wood 30mm Concrete 26mm Certification ISO Auxiliary handle 1PC Point chisel(14x250mm) 1PC Flat chisel(14x250mm) 1PC Drill bits(8/10/12x150mm) 3PCS Carbon brush 1Pair Dust cover