Features and Benefits: Durable acrylic vials Impact resistant endcaps protect frame and vials Hang hole for ease of storage Top read window provides clear overhead viewing Ruled edge All metal frame to survive harsh jobsite conditions Made in the USA This level has a rugged aluminum I-Beam frame with a top reading window for easy reading from above. The end plates are beveled to protect vials from shock if level is dropped. This level is great for the do-it-yourself.