This is a genuine DeWalt piston repair kit suitable for D25899K, D25900K, D25901K and D25902K demolition hammers. The kit is made in Germany and includes 1 unit quantity of high-quality parts and accessories essential for repairing your hammer. The manufacturer part number is 579779-01. The item is compatible with electric power source and is suitable for use in various industrial settings. This DeWalt kit is designed for those who value quality and reliability in their construction tools. It is ideal for professionals looking to prolong the life of their hammers.