Complete layout and measurement projects by yourself - no clumsy steel tapes simply roll on surfaces to measure in 1/16 increments over 300 ft. Layout calculator measures, adds computes evenly spaced points for precise layouts - it does the math! Auto -marking keeps surface clean - no need for pencils. Large, easy-to-read lcd and audible alerts indicate measurement position and track progress ideal for. Home improvement projects. Interior decorating small and arge spaces. Wall hangings and picture arrays product specifications. Measures to 328, accurate to +/- 1/16 every 10