Old C-clamps are a very easy way to mount lighting fixtures. However, soft aluminum gets scratched very quickly and can look less than great for bridezilla's wedding spectacular. Whether you are using a 12-20 inch touring truss or a 6-8 inch display truss, these Stage Right O-clamps are ideal. Fitted inserts (included) allow you to use 1-, 1.5 -, or 2-inch trusses with style and ease.