It has an unbreakable cast iron frame for strength and durability with nickel plated threads that are rust resistant for smooth operation.6 Inch Jaw Opening,Unbreakable Cast Iron Frame for Strength and Durability,Steel Swivel and Screw for Secure Grip,Nickel Plated Threads to Resist Rust The GreatNeck C-Clamp (6 Inch) features a steel swivel and screw for a secure grip on a wide range of surfaces.
Chain pins are produced from a special boron steel to improve strength.SENQCIA Inspire Series SBR riveted roller chain is manufactured in accordance with the ASME/ANSI B29.