The Irwin 2500 Box Beam Level has an unusual feature that makes it easier to use: a mirror that allows you to read the plumb vial from the edge of the tool (for those times when it's hard to look from the side). The tool has a thick aluminum frame, a continuous edge that spans the level vial, and removable end caps for leveling out of a corner. It comes in a variety of sizes from 24 to 96 inches.
¦ Price: $50 to $210, depending on length. 800-464-7946. www.irwin.com.