This tool is a screw-type grounding clamp (greaser) from the ESAB brand, specifically model CC11. Express Weldcare Services (EWS) +1 Here are some details about it: Usage: Used in welding operations to connect the ground cable to the workpiece. Capacity: This clamp is designed to handle currents up to 600 amps. Design: Made of a durable metal mold, it features a screw mechanism (lever) to provide maximum clamping force on the work surface.