Our best-quality pulley! Single aluminum pulley with a deep groove mounted in a non-adjustable steel bracket bolted to a vertical, steel table clamp. Accommodates tables or inclined boards up to 1-1/2” (38 mm) thick. Has a stamped line for rapid alignment of pulley cord, which is useful when using free-moving carts. The wide, fixed T-bar at the base of the clamp screw makes it easy to tighten or loosen by hand. Pulley diameter, 1-1/2”.