The Nitto Seiko FM503H series is an automatic screw feeder used to fasten screws. It uses pneumatic pressure to feed the screws from a hopper storage to the air feed system. It has a filter plate that ensures screws of correct shape are fed. The screws from the air feed system are held on the driver tip by a chuck. Maximum of 30 screws can be continuously fed for manual fastening. It can be used to fasten rivets, studs, bolts, and hammering nails or threaded rivets.