The Sneaker Walker Glides are great little walker accessories to have if you or anyone you know uses a mobility aid such as a walker for daily use. Many walkers do not include tips as standard items included with purchase, but those that do offer tips with their walkers are usually basic rubber tips that do not glide as smoothly but mostly drag on the floor which causes friction and resistance - which might be what you are needing if you walk more on hard floor surfaces and need to have some resistance to keep your from sliding accidentally. - For use as replacement of traditional rubber walker tip. Features fun, bright blue tennis shoe design to personalize the mobility aid. Allows walker to glide more easily and smoothly over most surfaces. Adjustable knob installation to accommodate all tubing diameters. Easy, tool-free installation. Turn clockwise to tighten, counter clockwise to loosen.