The K-D No. 882 Boat Motor Piston Ring Expander is a vintage tool made in the United States by K-D Tools. This single item piston ring tool is 5 inches in size and is designed to expand piston rings for boat motors. With a focus on quality and durability, this tool is a specialized automotive hand tool perfect for mechanics and boat enthusiasts looking to repair or maintain vintage boat engines. Made in the U.S.A., this piston ring expander showcases the craftsmanship and attention to detail that K-D Tools is known for.