LJ-LDG1901 Electric Rail Drilling Machine 36V Intelligent lithium battery rail drilling machine *Fully waterproof design, support rainy day work *Clean energy, green and pollution-free *Intelligent control system, keeps drilling at a constant speed, and displays the number of holes with remaining power *Super endurance capability : Drilling more than 40 holes each charge (31 mm diameter hole) Drilling more than 110 holes each charge (13.5 mm diameter hole) Drilling more than 180 holes each charge (9.8 mm diameter hole) *Ultra-light weight, only 15.9 kg including battery *Overload reminder and protection design *Quick-change design of the drill bit, do not need any additional tools