Whichever way you look at it the award winning Advent 2in1 Gap Tape is an ingenious innovation. Its double-sided printed blade means it measures internal spaces with the same effortless precision as normal measurements. With normal measurements on the top of the blade, the reserve blade markings take into account he tape case dimensions, so when you measure internal spaces you simply butt the case up to the end and read the measurement.
Simple. Accurate. No Need to Bend the blade.