Walter Surface Technologies is proud to introduce the first real innovation to Abrasive Grinding and Blending wheels in many years… SPIN-ON. This new revolutionary quick mounting system turns a standard ¼ inch grinding wheel into a 5/8-11 threaded wheel saving time and money for the end-user customer. Benefits:     Quick and easy wheel change saves valuable time during change out.     Wheel is perfectly centered on the tool insuring additional safety for the operator     Strong composite polymer material absorbs vibration for better control     Eliminates the need for a spanner wrench     Saves time and money for the operator