This cast aluminum support is designed to hold gas cylinders of all sizes from 4"" to 14"" in diameter, in an upright position. Adjustable, sturdy web strap (1"" x 54"") and buckle on heavy metal clamp. Large handled single screw attaches the support to the bench top (up to 2.5"" thick). A nylon pad prevents damage to the bench or table surface. Chain shown in picture is not included. Two tapered mounting screw holes are provided for permanent attachment to benchtop.