Constructed from a high quality proprietary polymer blend that is super durable. - Securely locks and perfectly positions your computer - Fits 31.8, 25.4 & 22.2mm handlebars - Simple one-bolt design makes installation a breeze - Compatible with Garmin Edge 20, 25, 130, 510, 520, 530, 810, 820, 830 & various other cycling computers - Not compatible with Edge 1000 series