A drilling machine with electric power.It is the conventional product in power tools, and also the most demand of electric tools.The annual production and sales volume accounts for 35% of China's power tools.The main specifications of the drill are 4, 6, 8, 10, 13, 16, 19, 23, 32, 38, 49mm, etc., and the number refers to the diameter of the drill hole drilled in the steel with the tensile strength of 390N/mm2.The maximum drilling diameter of non-ferrous metals, plastics and other materials is 30 ~ 50% larger than the original specification