Material: made of stainless steel, after brushed finish, rustproof and corrosion resistant..There are no complicated tools for mounting the standoff glass mounting hardware. Once installed, you can easily mount your signs or pictures onto the wall. When you want to change the picture, all you need to do is simply unscrew the cap and replace the pictures..Size: Each standoff mounting screw measures 3/4 inch in diameter, 2/5 inch in length. This is the most widely used size, perfect for hanging and mounting all kinds of signs and advertising boards for a special floating effect. As shown in the picture..Package includes: 12 pieces wall mount standoff screws, coming with clear rubber spacer for protecting glass or signs..Screws holders are suitable for indoor or outdoor use, mounting signs in office, store and exhibition billboard.