The patented Exel™® fitting is unique to Robert Scott & Sons. Exel™® sockets are hard wearing. The 'Push-Pull' type fitting prevents socket loosening from handle during wringing. Universal colour coded plastic Exel™® socket collar fitting screws or pushes onto handle. Made from thinner twine yarn which is more resistant to abrasion and suitable for more profiled or rougher flooring. Twine yarn doesn't lint as much as PY. Fits Abbey Hygiene Handle and Exel Mop Handle.