The drill is just an extension of the hand when you work. The clamp gently lowers and the drill starts to work. During this time, the finger does not get tired. The weight in the screwdriver is a little more than two and a half kilograms, the hand and wrist do not get tired. The battery lasts for a long time, until all the drills run out. It's nice that there are no wires. The battery itself charges fairly quickly.