The Zefal BAR PLUGS is a kit for repairing tubeless tyres that fits into the handlebars. It consists of 2 parts: the first part has a needle tool as well as 5 mm thick tyre plugs and the second part features a knife and 2 mm tyre plugs. You don't need any tools to attach it to the handlebars, simply turn the aluminium outer. Each part can be attached to the left or right depending on the rider's preference. The Z Bar Plugs give cyclists the possibility to have a versatile repair solution for punctures with them at all times while biking. The kit is compatible with handlebars with an inner diameter if 17-21 mm. The needle tool adaptor can be used for securing a safety chain. (not included)