6-In Iron Clamp 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.
Chain pins are produced from a special boron steel to improve strength. These solid bushing/solid roller chains offer exceptional performance and long life in a wide variety of applications.
Connecting links are used to connect the ends of the roller chain strand into an endless loop. Nickel plating helps prevent rust in many wet and mildly corrosive environments.SENQCIA Hi-Max Nickel Plated Double Pitch spring clip type connecting links are manufactured .