Over time small scratches form in your slider disks, which is normal. The Rotator Velcro system attaches each disk to the curling shoe for easy replacement of the teflon, if necessary, and/or rotation of a sliding disk to help eliminate drift due to scratches. This can be done repeatedly to extend the life of your sliders.
Teflon® 5/32" Asham white disk has a speed rating of 8 on a scale of 10.
Small - woman's back/heel.
Medium - woman's front or men's back/heel.
Large - men's front.