describe: HIGH QUALITY MATERIAL: The picture frame hooks are made of high quality ABS material, durable, compact, easy to carry, perfect and precise markings, decorate your walls like a pro. Well-Designed: Built-in level ensures your pictures hang straight. It is very simple to use, does not require too much debugging, and saves time. The rubber pad on the back of the tool prevents scratches on the wall. PRECISE HANGING POSITION: Level painting hanging is marked with centimeter and inch scales. Once you find the correct spot on the wall, press the button to mark the nail's location. Level indicator ensures you hang vertically. ESSENTIAL TOOLS FOR HOME LIFE: The picture hanging tool with measuring function is perfect for all types of hanging hardware, picture wire, serrated hooks, D-rings and keyholes. Perfect for hanging items such as paintings, clocks, mirrors and canvases. With the angled nail design and notched hooks, your mural can blend nicely into the wall without having to cut a large hole in the wall. Therefore, hang the painting firmly and safely. Package contents: 1 piece photo frame balance ruler