The Ball Studs and the Offset Nema Pad Ball Studs are made from tinplated copper alloy or copper. They each have a 1” (25.4mm) diameter ball. Recommended installation torque of 300 in. lbs. The short stud is used conventionally. The long stud can also be used as the grounding point for “C” or Duck bill clamps that have a jaw width of 2.75” or less. The Offset Nema Pad Ball Stud has the standard Nema bolt hole spacing and also comes in both long and short lengths.Features & Benefits:● Also Available, the Ball Stud Cover, made from orange SALCOR®, allows for multiple angle application when installed using a clampstick.