Adjustable Level. The Plumb Perfect Level features end gauges that can be dialed in or out to compensate for imperfect framing (or to establish a slope). The gauges are inscribed with inch and metric units that indicate precise deviation. Two of the three available models feature extendable sleeves so users can span the exact length they need: One extends from 24 to 42 inches and costs about $240, and the other extends from 56 to 98 inches and costs $360. The fixed 48-inch model costs about $130. Plumb Perfect Level, 704/363-2104, plumbperfectlevel.com