Bionic Super Stoppers Toe Stops Standard Length 30mm Stem by Atom GRIPPY: 45mm footprint for extra bite on the skating surface PRE-CUT WEDGE: Pre-cut wedge shape makes it ready to use right out of the box. LENGTH: 30mm Stem COLOR: Grey POPULAR: Used my many skaters and designed to meet the high demands of derby and other skating. By Atom Wheels.