Thumb Screw with Rubber Washer (4 pack) 1/4" bolt with plastic molded head for easy install or removal. The package includes 4 thumb screws and washers. High quality stainless steel for long lasting outdoor use. Please be sure to purchase the correct length of thumb screw. We currently use the 3/4" thumb screws for the following: Full Glass Windshield for CAN AM Maverick X3 (Wiper Optional) Polaris RS1 Glass Windshield with Vent and Wiper, Billet Mounts Wildcat XX Vented Glass Windshield with Wipers Vented Full Polycarbonate Windshield with Quick Straps for 2019 RZR 1000, Turbo (upgrade options) We currently use the 1/2" thumb screws for the following: Full Glass Windshield for Polaris RZR Turbo "S" Model (Wiper Optional) Full Glass Windshield for 2019 RZR XP 1000, Turbo (Wiper Optional) Full Glass Windshield for RZR 900, 1000, Turbo (Wiper Optional) WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov