Rubber nuts consist of a rubber sleeve with a captive brass nut. Tightening a threaded screw into the brass nut expands the insert to secure the fixing. Vibration and shock resistant, dampens noise. Well nuts are used as bodywork and windshield soft mount on a motorcycle, snowmobile, or other high vibration machines. Can be used in blind holes and tubes. Fits all M5 metric machine screw. Replace your dried out and damaged rubber wellnuts. Easy installation, no install instructions. Package Include: 25 x Windshield Well Nuts