Electric screwdrivers are generally divided into three series:
802 series screwdrivers with a 6 mm shank diameter of the batch head.
The 801 series screwdrivers are supplied with a 5mm shank.
800 series of screwdrivers with a shank diameter of 4MM batch head
Please be sure to find out before the purchase of each unit of their own electric screwdriver with how much shank diameter, total length of how long, how big the head of the screws.