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 USAThis 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.