Cast Iron 2" Single Groove Belt A Section 4L V Style for 5/8" Keyed Shaft Masterdrive high-quality cast iron single groove 2" pulley for A section / 4L belts. This pulley is designed to fit a 5/8" keyed shaft and features dual set screws to ensure a completely secure fitting. Most pulleys that are similar to this only have one set screw, making them less reliable in many working conditions. This pulley is designed to be used with A Belts (also known as 4L Belts). Specifications 2" Diameter Fits 5/8" Shaft Solid Cast Iron Construction Features Dual Set Screws Secure Reliable Performance