1Prevent rust and corrosion, easy to install item, level can immediately perfect installation, with hole for hanging. 2Outdoor mountaineering camping accessory, strong usability, level, adjust camera tripod level. 3Universal level bubble, can adjust ballhead, photo frame, wall paint, wall calendary, camera, office desktop, computer case display, computer display, office machines, tripod, toy, special instruments, furniture place, woodworking measuring implement, factory mechanical equipment, armarium level, and require high measurement accuracy can used. 4Can make your frequently used items more convenient adjustment, more accurate angle, better positioning your life and space, for example: put one on the computer monitor, your view will never tilt. 5Made of high quality plastic material, sturdy, durable and long service life.