The Odyssey Par Ends are a step up from your average bar end. Odyssey has made these bad boys out of a special plastic composite witch makes them light weight and will ensure that they do not fall out. The plastic composite they use ensures that they will not shatter like cheap bar ends do. The Par End is a combination of the over the bar style cap and the inside the bar style to prevent the inner portion from blowing out like it does on ordinary press-fit bar ends. Pus, these come with a bolt that screws into the middle that spreads out the par end and tightens onto the bars and wont come out unless you loosen that bolt.