The Pro Jump Bouncing Stilt Left-Hand Clip features the following specifications… Suitable For – The Pro-Jump Black Fastener is designed to fit all past and current Pro-Jumps including the Junior F-Series and C-Series Adult M-Series and CZ-Series Exo & EXO PRO bouncy stilts as a replacement or upgrade part Compatible With – This buckle MAY also be compatible with other brands of Powerbocks (however we can not guarantee this ) including PoweriZer PowerStrider Fly Jumper Jolly Jumper Air Trekker Air Runner Speed Jumper PowerStrider 7 League Boots PowerSkip and PoweriSer. If you are unsure after checking the photos and description the Pro-Jump Forum (search Google) may be able to advise if you post photos of your Jumping Stilts. Quantity Supplied – One LHS buckle is supplied What You Need To Fit – 1 bolt and nut (not supplied) are needed to fit the buckle to the binding strap