WELL MADE - The c-clamp is made of heat-treated high strength malleable iron, which is strong, durable and not easy to deformation. The black-coated surface can protect it from rust. It is solidly built and works properly, which can ensure long service life. ADJUSTABLE JAW - This malleable iron c-clamp features an adjustable jaw. It can be adjusted from 0 to 4 inches by turning the T-bar handle. The throat depth is 2.36 inches, you can use it to hold objects of different thicknesses. SWIVEL PAD DESIGN - Our heavy duty c clamp has a swivel pad to reduce damage to the work surface and increase stability while turning the clamp . At the meantime, the sliding T-bar handle can offer multiple hand positions for beat leverage. WIIDE RANGE OF APPLICATION - The 4 inch c-clamp can provide strong and rigid clamping force, is widely used in assembling, fastening, bonding and welding parts in woodworking, construction, automotive, metalworking, and is suitable for other general clamping needs. AFTER-SALES SERVICE - We hope you are satisfied with our products, which is why we provide you with a risk-free purchase. If you have any questions or dissatisfaction with our c clamps, please feel free to contact us. We'll get back to you within 24 hours. This product comes with a 30-day money-back guarantee.