Clamp jaws and jaw-housing are constructed of a non-rusting die-cast alloy. Vinylized jaws have 3 fingers for gripping articles that are shaped irregularly. Jaws are adjustable independently of each other. Overall lengths: small 6.5"", medium 9"", large 10.6"". 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.