Double-sided Print: Projecting Biohazard signs are printed on two sides. Such signs are great for hallways where people are coming from either direction. Signs project from the surface at a right angle, and nobody can miss important information regarding Biohazards printed on these signs. Angular Visibility: While our flat, one-dimensional signs can be read-only from the front, our Projecting V-signs have a 74° bend for superior visibility. These signs make it really easy to spot “Biohazards” from any angle. V-shaped signs have two flanges and two pre-drilled mounting holes on each flange. Just use some screws to fix the sign on a surface using the drilled holes. If not screws, you can use adhesive tape included in the order.