The A-50 Series Screw Presenters are modular! A simple rail change and readjustment is all that's necessary to change a unit for use with a variety of screw sizes. Change from one fastener to another in less than five minutes. Presents fastener to operator for easy magnetic or vacuum pickup For #0 - #10 screws Feed speed of up to 2 screws per second Requires use of magnetized bits or a vacuum system