The Milwaukee® 3/4 in x 100 ft inner core drum cable is constructed of industrial steel spring. It carries power through the end of the cable for maximum clog crushing force. These drain cables are compatible with the MX FUEL™ MFX500 and MXF501 sewer drum machine and other professional drain cleaning machines. Milwaukee® drain cables are backed by a 2 years warranty. Milwaukee® MX FUEL™ Drum Cable, All Purpose Wind Inner Core, 3/4 in Dia x 100 ft L Size, For Use With: MX FUEL™ MXF500-1CP, MXF501-1CP Sewer Drum Machine, Steel Spring