Lehtkaliibrid koosnevad mitmest erineva paksusega terasest väikestest lehtedest, mille igale lehele on märgitud paksuse väärtus ja neid kasutatakse enamasti inseneriteaduses, et mõõta kahe osise vahelist pilu.
Feeler gauges are mostly used in engineering to measure the clearance between two parts. They consist of a number of small lengths of steel of different thicknesses with measurements marked on each piece.
