Finish a large area of concrete quickly with these quality blades. Heavy duty blade is designed to provide even coverage when using ride on or walk behind power troweler machines. Each blade is made of heavy duty steel to exacting specifications for a superior blade. Designed with a hard thick steel to cut down on blade changes on the job creating a longer life and greater performance than standard blades. The finish blade is used at high speeds at a slight angle to create a strong, hard, shiny surface. The 18 x 6 in blade fits most 36 in machines. A bar mount is used to connect the blade to the machine. 4-blades per carton. Proudly made in the USA. Kraft Tool Co.® has been an American manufacturer of quality hand tools for the concrete, masonry, asphalt, plaster, drywall, tile, floor covering and leveling trades for over 35 years.