Magswitch on/off magnetic workholding square with 150lbs/67kg holding capacity. For use in welding, woodworking or anywhere steel is used. MagSquares exert a strong magnetic hold on 3 sides, and provide fast and easy multi-plane workholding for positioning steel. Magswitch MagSquares open a powerful magnetic field with a simple 180-degree turn of the knob. Machined at 90 degree angles, MagSquares are ideal for fixturing and offer many uses: level sheet, support, stop, guide, mounting base; the uses are endless. A must for every fabricator and welder. Featuring the patented Magswitch® technology for complete on/off control, super strong, precise positioning. Holds flat and round steel.