Roswell 360 Degree 3" Universal Clamp [C920-0747]360 Degree 3" Universal Clamp The 360 3 inch Universal Clamp allows users to fine tune the tower speakers rear facing direction. No need to "come close" any longer. Just set it where you want and lock it down! Features: Compatible with most Roswell Tower Speakers External set screws allow for 360 degree rotational mounting positions Machined from billet aluminum with a sandblasted clear anodized finish Saltwater friendly Includes: 1. 9, 2. 375, and 3