4x magnets (15 x 47 mm) for holding the board securely during soldering work Bomb-proof fixing for your workpiece: The strong magnets hold your board securely in place, allowing you to apply even the smallest solder points with precision: no slippage, no vibration. Unlike models with tips on which the PCB rests, the mounting in the side notches guarantees an absolutely secure hold, especially for light and small PCBs.