It is not enough to know just the grade; it is the thickness of the chain links that determines the weight that can be lifted. · Nominal diameter (d): The diameter of the round steel bars that make up the chain links, measured in millimeters (mm). This is a crucial dimension parameter. · Pitch (p): The distance between corresponding points on two adjacent chain links. Common specifications are indicated in the form of “φ10×30”, meaning a diameter of 10 mm and a pitch of 30 mm. · Type of chain: For lifting purposes, short-link chains are usually used (with a ratio of pitch to diameter of around 3:1), as they are more compact, stronger, and better suited for working with sprockets. · Load capacity: It is necessary to consider the working load limit (WLL) specified for that particular chain, rather than relying solely on its diameter.