Ridgid Model 535A Automatic Threading Machine has a large 1.75 gallon oil reservior a 3-speed transmissionand automatic chuck. High clearance carriage and generous top cover area for keeping tools and fittings handy. Uses Model 816/817 semi-automaticModel 815A self opening or Model 811A quick-opening die heads. It can be used with the Model 141 Geared Threader. Comes equipped with a length gauge for quickaccurate cut-off.