Dongcheng 250W Electric Drill Machine DJZ08-10 is a power-driven mechanical tool that uses electrical energy to generate rotary motion, which is then applied to one or more drill heads. The shaft of a cordless drill is used as the main component of this product. This product can drill holes in various materials, such as wood, steel, and concrete. The key component of this product is the easy maintenance of its battery and spindle motor. General frequently asked questions. Q1. What is the rated power input of this Dongcheng 250W Electric Drill Machine? The rated power input of this Dongcheng 250W Electric Drill Machine is 250W. Q2. What is the no-load speed of this Dongcheng 250W Electric Drill Machine? The no-load speed of this Dongcheng 250W Electric Drill Machine is 850 RPM.