The square box includes cast iron square box, marble square box, magnetic square box, crossed square boxes, inspection and square box, universal side boxes, etc.. The square box is an important tool in the flat panel measuring the fitter three-dimensional crossed the mechanical components of the degree of parallelism, perpendicularity and position errors of measurement and inspection. Magnetic square box is mainly used for machinery or workpiece parts parallelism, perpendicularity inspection and crossed. 
 The use of magnetic square box and cast iron square box is close, the difference is that the magnetic square box V-groove and the bottom part are magnetic, so the workpiece can be firmly fixed in a square box, easy to use; also greatly reduces the due to the negligence of the workpiece instability, or operation, the workpiece fall, causing injuries to staff. 
 More Products: cast iron plate | magnetic square box V frame 
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