Hub for Hydraulic Root Cutter RSH 1A Category_Default Category Products Manhole Tools Sewer Camera Hooks Grease log chopper now with THC 8 Grease log chopper now with curved side to better push material in the invert These skis are made ½” undersized in the smaller sizes to 15” and they 1” undersize form 15” to 18” and 2” undersized in the large diameter 22” and 24” so that they may ride up over any offset and allow for misalignment in the pipe These hubs or arbors are essential for attaching your root saw blades to the rotating shaft of the hydraulic root cutter This one is made especially for our standard duty 1 8” thick saw blades