Made of Stainless Steel material, longevity, good toughness SizeOpening 47MM models: Length is 3.8cm/1.5 inches, width is 3cm/1.2 inches, height is 4.7cm/1.8 inches, opening is 4.7cm/1.8 inches. Packing includes2 x Stainless Steel C Clamp. This C-clamp is specially designed for woodworkers, welders, construction workers, photography, or do it yourself. The clamping is firm and the relief is easy. heavy-duty design of the clamp can ensure that the clamped object will not be easily deformed. Our welded and wooden clips, with their stainless steel frames and steel clamping screws, provide a safe, unshakable grip that you never have to worry about. 1. 1-2mm error might exist due to manual measurements, please kindly understand. 2. Different light shooting and different displays may cause the color of the item in the picture a little difference from the real thing.