This is a Garmin Oregon cycling GPS handlebar mount kit with Ramtech handle lock. The mounting kit is designed to handle vibrations, especially from the slightly heavier Oregon 500/550. On roads with big bumps, the GPS may even fall off the holder, but this lock fixes the position in the vertical and horizontal directions (ix and y axis), providing a stronger mount. The handle can still be tilted (360 degree rotation). 2 nylon zip ties (2.5mm x 150mm) are needed. The product is compatible with the Garmin Oregon 200 300 400t 400i 400c 450 450t 550 550t 600 600t 650 650t 700 750 750t, as well as the GPSMAP 66 series.