its heavy-duty aluminum frame ensures accuracy and is durable enough to withstand even the roughest jobsite abuse and that frame is protected by shock-absorbing end caps . , durable acrylic vials that are impact resistant along with a top-read window allowing the user to stand over the work to view the vials

Aluminum reinforced frame. Rubber magnetic working edge allows for hands-free use on ferrous metal surfaces. SurroundView vials reflects ambient light for easy read