Hammerhead Karoo Quarter-Turn Mounting Adapter Description: The Hammerhead Karoo Quarter-Turn Mounting Adapter allows you to attach your Karoo to a standard quarter-turn mount if you have aero handlebars. The adapter is used in conjunction with a standard quarter-turn bracket and mount. Note: If the bracket is an out-front type it needs to be compatible with the Edge 1000 series devices (or other larger head units). Features: For use with the Karoo Cycling Computer and aero handlebars Works with any standard quarter-turn mount Specifications: Device Compatibility: Karoo Handlebar Diameter Compatibility: - Weight: 5.3g