Toledo offers a well integrated combination of craftsmanship and technology in all their products such as the heavy-duty, DA300150SS. This double-action spring hinges its stainless steel from the body to the screws. It also, features a 180° opening angle, rust and corrosion resistance and adjustable closing speed. This product is ideal for wood and metal door with 1-1⁄4 in. to 1-1⁄2 in. thickness.