Fangrui Product Details 1. Nylon Combined With Fiberglass Construction For Durability And Rigidity. 2. This Adapter Is For Attaching Your Cycling Computer To Any Mount With A Universal Interface. 3. A Stable Way To Fix The Bicycle Computer, And A Good Solution To Expand The Use Of The Bicycle Computer In Different Occasions. 4. Compatible With For Edge 500/510/520/800/810/1000 And Gs20 20p 60, , Cateye, Blackbird, Cycling Computers. 5. Support To Install For Edge Computer With Leather Case. Wrench Diameter: Approximately 2.0mm For Edge, , Cateye, Blackbird, Material: Nylon+glass Fiber Colour: Black Package Contents: 1 X Bike Computer Mounting Adapter 2 X Screws 1 X L-shaped Wrench Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.