This lot includes three Climax metal clamp collars with a 1 3/8 inch bore size. The collars are made of zinc-plated steel and are designed to secure shafts in place. These clamp collars are suitable for use in a variety of industrial applications, including mechanical power transmission and automation. The Climax 2C-137-Z model is reliable and durable, ensuring that your shafts are properly supported and secure.