![omni cubed](/ext/resources/Issues/April2012/SW0412-Feature-NP2.jpg)
The disc acts as a built-in roller guide, which allows fast and precise cut patterns, while also reducing the typical damage caused by the edge of spinning polishing pads. The backer has 5/8-11 threads and includes a PVC spacer washer to keep the threads from locking up on the polishing spindle when hot. USA Patent Pending.