All-metal BACKBONE. Strong and durable frame. Reinforced vial retention. SHARPSITE vial technology improves the readability of the vial. Wide, durable handles for comfort and portability. Precision milled measuring surface provides accuracy in all working positions. High contrast vial system is easy to clean and optimises visibility. Shock absorbing and removable end caps protect the frame. Overmolded, non-slip grips stick to the wall and prevent sliding. Durable, all-metal hang hole for storage. Accurate to 0.029掳 (0.0005 藵/in, 0.5 mm/m) In normal and reverse position.