Permanent, laser etched 1' increments on the tape allow you to more accurately measure the depth of conduit runs and determine the amount of tape left to pay out. The 13" case diameter means you can reel in 15% more tape in a single revolution than similar sized 12" tapes, saving you time and effort. Tempered, high quality tape keeps its stability as it glides between surfaces for effective pushing and pulling of wire under carpets, through insulated walls and over suspended ceilings