The Milwaukee Hand Tools REDSTICK™ BACKBONE™ Level has an all-metal frame with reinforced vial retention. Shock absorbing end caps further protect the frame. SHARPSITE™ vial technology improves the readability of the vial. Its high contrast vial system is easy to clean and optimises visibility. The precision milled measuring surface provides accuracy in all working positions. Overmoulded, non-slip grips stick to the wall and prevent sliding. There is also a durable, all-metal hang hole for easy storage. Accurate to 0.029° (0.0005in, 0.5mm/m) in normal and reverse position.