The Johnson Professional Aluminum 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. The professional aluminum level's 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 if the level is accidentally dropped. This aluminum level also comes equipped with replaceable and 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.