Johnson’s 3800 Ibeam level was designed to be durable and easy to use so much so that it has been the standard in the industry for over 30 years Its heavyduty aluminum frame ensures accuracy and is durable enough to withstand even the roughest jobsite abuse and that frame is protected by shockabsorbing end caps if the level is accidentally dropped The level also comes equipped with replaceable, durable acrylic vials that are impact resistant along with a topread window allowing the user to stand over the work to view the vials This level’s strong magnetic edge provides handsfree use on ferrous metal surfaces