Jobsites are rough, and the Johnson Aluminum Box Level is designed to be strong and durable enough to take on that jobsite abuse. The aluminum box level comes equipped with solid block acrylic vials that won't fog, leak or break, and the shock-absorbing end-caps protect the level when dropped, ensuring it stays accurate for life. When working in poorly lit areas, the box level also comes with SurroundView vials that reflect ambient light to keep them easy to read.