Features: Made of qualified aluminum alloy, solid, firm and durable to use. With this kit , you can mount a bike computer or Gopro action camera on the handlebar easily. It is a extension mount holder for gopro, garmin computer and sports camera and other accessories. Easy and convenient to use. Compatible with: For Garmin???GARMIN1000???820???810???800??? 520???510???500???200 For Bryton???R530/R330/R310/R100 For Cateye???All model Specification: Material: Metal Screw Thread Diameter: 4.8mm Color: Black | Red Note: Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting. Thank you for your understanding, nice day! Package Includes: 1 x Bike Extension Bracket 1 x Mounting Base for Garmin 1 x Mounting Base for Bryton 1 x Mounting Base for Cateye 1 x Mounting Base for Gopro 1 x Light Holder Kit 2 x Screws