[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 , - 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 desktop and wooden strips, with strong clamping force and easy to use. Please note: There is a slight color difference or discrepancy in kind, please don't mind, thank you! Material: Stainless steel Color as shown Package Contents: 2 x Metal C Clamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.