Yes, in it a plastic gear transmits torque from the motor shaft to the cooling impeller, but the plastic is quite hard. It develops full power on an 8 Ah ProCore battery, from 4 it cuts not so cheerfully and 2 times less in time. Charging in the kit is 4 ampere, and the complete battery is charged for an hour, and 8 is about 2x. For constant grinding of metal, or cutting without stopping will not work, for my tasks, cutting a corner, rounding corners, and even making a strobe will do. Of course, I want to go faster, but this is already a set of 2x 8 batteries with a quick-charge GAL18V-160C. But then you want more power, a kilowatt and a half, and this is GWX18V-15. That is, not 15, but 40 thousand.