Durable aluminum pulley mounted in a bracket on a rod that can be attached to a flat surface with the included clamp. Pulley is 50mm in diameter and is grooved to assure a proper tracking location for string. Threaded rod is 8" (203mm) in length and is approximately 8mm in diameter. Sturdy thick metal clamp mounts on surfaces up to 2 7/16" in thickness. A large "T" spindle makes it easy to tighten. Pulley on a rod attaches to the clamp using a smaller "T" spindle.
Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.