Tilt Control

Box-style levels are more resistant to twists or bends than levels of the same weight and length shaped like I-beams. This aluminum one has a built-in mirror (INSET) that lets you check the verticality-testing plumb vial by looking through the level's edge rather than pressing the side of your head against a wall. For hands-free work, fit separately sold hooks and hangers into keyhole slots in the level's sides. 24 inches; Approx. $69, Irwin