The Sure-Grip Shock Stop is a high performance toe stop made for roller derby that has an exciting never-before-seen rubber compound that is highly durable and grips well on all surfaces. These long-lasting stops are lightweight (thanks to a hollow stem) and highly abrasion resistant, even outdoors! The ultra-large flat surface gives skaters extra stability & control when up on their stops and is littered with holes that provide extra bounce for jumping & quick starts.