These toe stoppers are used to brake at any time during roller skating to ensure safety. They are suitable for double-row roller skates.Advantage1. Made of rubber with good abrasion resistance and firmer grip. Toe stoppers can stabilize the braking when rolling at extreme speed, making the braking faster and safer.2. The jam plugs does not make a harsh sound when braking and is suitable for most floors, such as wood floors, asphalt floors, concrete floors, etc. Toe stops leaves no traces while gliding and can be used indoors or outdoors with confidence.Instruction1. Insert the bottom of the screw into the larger diameter of the brake.2. Use a screwdriver to tighten it into the roller skate.NOTE: Please check the size carefully before purchasing.