The Grainger Approved MAGic Clamp Magnetic Clamp is a versatile magnetic clamp with a holding capacity of up to 220 lbs. It features a powerful neodymium magnet that allows the clamp to be attached to ferrous metals. The clamp has a 3" jaw opening and can be used for welding, fabrication, automotive work, and other applications requiring hands-free workholding. The clamp's swivel base allows for 360 degree rotation. It is constructed from steel with a durable powder coat finish. Overall dimensions are 3.75" x 2" x 4.5" and it weighs 1.1 lbs.