Jaws grip up to 2.7"" (69 mm) diameter. Grips rods up to 3/4"" (19 mm) diameter. Can be rotated 360°. The wing nut will securely lock in any position. Vinalized jaws. Fiberglass sleeve covers are included to provide protection of plastic sleeves above 100°C. Do not subject clamps to direct flame or constant temperatures above 150°C. Nickel-plated zinc construction.