The 5-pin pressure clamp is used for mounting the wheel in the balancer. The clamp has an adjustable pin spacing and is designed for rims with 5 mounting holes. It ensures excellent centering of the wheel during the balancing process. It is also highly recommended for handling expensive aluminum rims. The clamp's pins secure the rim through the bolt holes, protecting the rim's surface from accidental scratches, such as those that might occur with a pressure sleeve.