[Size]50 x 40 x 130MM/1.9 x 1.6 x 5.1Inch(L x W x H). the clamping thickness is about 99-123mm/3.9-4.9inches, There are a M10 threaded hole and a M8 threaded hole.The thread on the screw allows it to slide smoothly without sticking or binding..The thread on the screw allows it to slide smoothly without sticking or binding [Heavy Duty C-clamp] C-clamps are made of high-quality stainless steel with coated , corrosion-resistant and rust-proof, strong and not easy to break; I-beam design provides sure strength, a firm grip while the clamped object not easily deform. [Wide range of applications]C-type clamps are powerful and versatile, and can fix parts for assembly, fastening, bonding and welding. Widely used in furniture manufacturing, metalworking and home ,automotive applications, this reliable metal C clamps can that everything is in the right place. [Convenient to Use] Clamp with adjustable positioning screws, which can be adjusted according to needs, can be easily clamped on any