The pack of the TEXALAN Locking C-clamps consists of two, each with a total length of 18", the jaw depth of 6"(200mm), and the clamps materials up to 4-3/4" (160mm) thick.Heavy duty Chrome Vanadium steel jaws and teeth with premium wear and corrosion resistant nickel plating.It is good in excellent wear resistance and high hardness.Also the clamps are very easy to operate.Adjust the pressure level and fit the object at hand.Turn knob adjusts working pressure to lock securely at varying widths.It is an ideal choice for clamping bulky work pieces and is widely used for all kinds of clamping fixed work, hot work, etc.