FITMENT:Removable Rear Cargo Box compatible with 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 Polaris Ranger 500 570 900 1000 including XP, General 1000, Massimo T Boss 550 EXPANSION SCREW DESIGN: The UTV Cargo Tool Storage Box is mounted with 2 posts + 1 built-in expansion screw. After installing the cargo box to the original hole position of the car and installing the expansion screws of the storage box, twist the middle screw to expand it so that the storage box can not be taken out to prevent theft SAFE DESIGN: heavy-duty waterproof lid prevents dust and water from entering the box and ensures a tight seal, always keeping items dry and clean; mortise and tenon hinges, the lid is not easy to dismantle; double-locking design, providing strong security for your storage space LARGE SPACE STORAGE: The UTV bed storage box offers an additional 21L of storage capacity to protect your gear and belongings, including first aid kits, gloves, backpacks and other tools too; it's perfect for organising drinks, bottles, clothes, tools and other items as well as storing essentials such as clothing and food on long journeys WHAT YOU GET: 1 Pack 21L UTV bed storage box 1