Adjustable Welding Magnets are constructed of two heavy-duty Alnico alloy magnetic blocks linked together with strong steel bar and wing nuts for easy angle adjustment. Great for steel plate work. The permanent ceramic Magnetic Holding Clamp will not lose magnetism. It is sandwiched between two steel plates for added strength. Ideal for holding ferrous metals at fixed angles, the unique design provides fixed 90°, 75°, 45° and 30° angles. Painted surface prevents rust.