The K-EDGE Garmin TT Mount is the most advanced Time Trial and Triathlon computer mount available. Featuring a twist-lock mechanism to lock your Garmin with confidence. The aluminum design and unique locking feature make our K-EDGE Garmin TT Mount by far the most advanced mount on the market. With traditional TT mounts for the Garmin computer, you have to either have enough room between the extensions to perform the ¼ turn “twist” or the computer has to be mounted above the extensions. Attributes (specs): CNC Machined 6061-T6 Aluminum Platform, Injection Molded Copolymer Interface Compatibility – 22.2mm diameter TT Extensions Supported Computers – Garmin Edge 20, 25, 200, 500, 510, 520*, 800, 1000, and Forerunner 310XT Made in Boise, Idaho, USA Lifetime Guarantee against material or manufacture defects. Damages due to abuse or crashing excluded. * Garmin 520 is not compatible at this time. ** NOT compatible with WAHOO . ** For the latest info on compatibility, visit the K-Edge website https://k-edge.com/shop/computer-mounts/garmin-mounts/tt-mount-garmin/