This is a perfect solution for balancing your guidescope or piggybacked camera. This counterweight assembly is used with ADM Accessories Mini Dovetail Bars (sold separately). Includes 3.5lb weight. Weight allows balancing in two directions. The weight can be moved back and forth on the Mini Dovetail plate or up and down using the threaded rod. Black anodized and stainless steel. The 3.5lb counterweight is professionally powdercoated.