Magnetic Ground Grounding Block Magnet Clamp For Arc Welder Welding Ground Wire No Matter Where Youre Welding; You Can Ground Your Weld Fast With This Handy Magnetic Welding Block. A High Powered Magnetic Base Sticks To Anything You Weld Making It Perfect For Pipe And Pieces You Cant Grab. Take The Hassle Out of Grounding With This 4 Magnetic Welding Block! Threaded Brass Stud High Powered Magnetic Base Portable And Easy To Use