Product : high strength ABS , super magnets This L-bracket is common used to all type of Levels , it can absorb iron steel by magnets , or fixed hanging in various construction applications by hanging hole , make up a Levels height restrictions and special occasions installation in the using Usage range : all kinds of 1 / 4 " thread Interface Levels Powerful magnet adsorption iron surface suction : ≤3kg, Manufacturer: Watreketal