The Ridgid 36043 K45-Drain-Cleaning-Machine is the professional's choice for cleaning small secondary drain lines from 3/4" to 2-1/2" in diameter. The 36043 is the two way Auto-Feed version, which allows the cable to be advanced and retrieved with the push of a lever. The two piece twist-lock drum will not dent or corrode, and allows easy access to the inner drum. A forward / reverse switch controls the drum and cable rotation while the variable speed on / off switch gives you control of the motor.