Easy installation just by tightening with a screwdriver. Ideal for GL construction methods. For use with gypsum boards. Length: 1.0 inches (25 mm). Compatible screw diameter: 0.1 - 0.1 inch (3.5 - 4.0 mm). Head diameter: 0.5 inches (12 mm). Maximum tensile load: 0.1 kN (slyardboard thickness: 0.4 mm). Head diameter: 0.4 mm). Plastic (0.4 mm).