The patent-pending Wolf Tooth bar plug attachment is one of the coolest differentiating features of our Singletrack Pogies. This 1/4 turn locking attachment makes installing and removing the pogies a cinch. No screws, no velcro, no hassle - just click them in and ride. An extra set of Pogie Bar Plugs make it super easy to move the pogies around from bike to bike. It is possible that these plugs will work with other brands of pogies or hand covers that need a more convenient attachment solution. Expanding mandrel bar plug 1/4 turn locking attachment Compatibility Most flat bars on the market. The inner diameter of the handlebar should be between 17.4mm and 20mm. Designed for use with the Wolf Tooth Singletrack Pogie but will work with some other hand covers, bar mitts, or pogies installation instructionsfor details on installing pogies Related Products Wolf Tooth Singletrack PogieNot e that Wolf Tooth pogies come with one pair of these bar plugs Tech Specs Weight:28g per pair Material: Unique polymer blend resistant to impact at extremely low temperatures Dimensions: Made in the USA Patent Pending Patent and trademark information [snippet name="Prop 65"]