The Herculus Box Level provides a Plumb Site Dual-View vial and 3 solid acrylic vials. Provides an accuracy of 0.0005 in/in. (0.5mm/m) and 2 milled surfaces up to 48" (120cm). Includes shock absorbing bi-material end caps and Ergo Grip non-slip handles. Level is available with rare-earth magnets and level length 24" (60cm).