Wether you are using the Garmin 200/500 or larger 510/800/810, our clever Dual Mounting Position design is optimized with no screws to lose & no bolts to adjust. Taking aesthetic & function one step further, weve engineered a platform for Shimano Di 2 & Campagnolo EPS electronic shifting modules on the underside of the 2.0. Our single bolt, Full Wrap Clamp is easy to install without removing the handlebar tape & is added protection that your Garmin will never "fall off" even without the bolt over the roughest terrain. Tested at the highest level. The Bar Fly is the preferred choice of Pro Tour road cyclist, Ironman triathletes, & World Champion mountain bike racers. Plastic on Plastic design Garmin computers are made from Plastic & so is the Bar Fly. We chose Delrin, the highest quality plastic, because it is the most appropriate material for this key interface. Hard materials such as aluminum have been found to "eat away, & shave off, material that can permanently damage your Garmin computer. With Bar Fly products there is always Zero Risk of over-tightening Carbon handlebar safe.