The K-EDGE co-polymer insert for Garmin 1/4 Turn style computers is a replaceable item. While it is extremely strong, we designed this insert to fail on a significant impact before the tabs on the back of the Garmin break. - Qty 1 - K-EDGE Co-polymer Insert for Garmin 1/4 Computer (Part No. K13-503) - Qty 2 - M3 x 0.5mm x 6mm with Pre-Applied Nylon 180,18-8 S.S. Screws