The General Speedrooter 91 is made to wash drains from 3″ – 10″. You’ll use 1/2″, 5/8″ and 3/4″ cables on this machine. This unit has been used and has typical wear marks but still works great. It comes with the cutting blades shown within the picture and approximately 85ft of 5/8″ cable. Has also been upgraded to a 3/4HP motor from the usual 1/2HP from the factory for more power with 3/4″ cables. An air switch powers off and on for one person use and comes with a power feed assembly which permits the machine to feed itself out and in of the drain with a lever action forward, reverse and neutral setting. Also the motor has a forward and reverse for those times when you can get the cable stuck within the drain and want to reverse the rotation for removal.