MaterialMade of high-quality stainless steel,corrosion-resistant and rust-proof,very strong and not easy to break. Widely Used: This C-clamp is designed for woodworkers, welders, and construction workers. It is suitable for general clamping needs and is used in assembly, fastening, bonding and welding in metal processing and automotive applications. Size: Length is 34MM/1.3 inches, width is 24MM/1.0 inches, height is 30MM/1.2 inches, opening is 30MM/1.2 inches, and the clamping range is 16-25MM/0.6-1.0 inches. Ractical Design: This C-clamp is made of heavy-duty Cast malleable steel frame with I-beam design provides sure strength.The heavy designed clamp can ensure that clamped object will not deform easily. Easy to Install: Aperture is M8 threaded holeWith an adjustable positioning screw,can easily clip to any desktop up to the clamping thickness is about 0.6-1 inches.