Features:Rock solid?? stiff & secure grip. Easy to fit - no need to remove tape/grips/levers etc.?? simply opens up and you bolt on with a hexagon wrench.This is not the inferior cheaper style that snaps when you do this?? or in cold weather!Sits in front of your stem/bar so you can look at your Garmin easily?? keeping your eyes on the road/trail as well. Compatible with computers with 1/4" turn twist lock interface. Basically it's used for Garmin with 1/4" turn twist lock surface.You can use it for Gopro All Sports camera and for Garmin VIRB X &XE/for AEE/for SONY/for XIAOYI/for SJ4000 5000 6000 action camera by using that adapter?? which help you to install very easily.Compatible for Garmin Edge series 200?? 500?? 510?? 800?? 810 and 1000 bike computers.Note: The original clamp size of the GPS mount is 31.8mm. You have to insert the spacer to make it fit 25.4mm.Specifications:Brand: AndoerMaterial: PlasticColor: BlackClamp Dia.: 31.8mmFits for 31.8mm handlebars and compatible for Garmin EDGE GPS & for GOPRO?? for AEE?? for SONY?? for XIAOYI action CamerasAdditional Fittings: 25.4mm (The original clamp size is 31.8mm. You have to insert the spacer to make it fit 25.4mm handlebar.)Dimensions: Length: 14.2cm; Width: 5cmPackage Size: 16 * 6 * 4cm / 6.3 * 2.4 * 1.6inPackage Weight: 77g / 2.7ozPackage List:1 * Front Mount Holder1 * Spacer2 * Hexagon Wrench1 * Long thumbscrew1 * Adapter