Usually, calipers. an instrument for measuring thicknesses and internal or external diameters inaccessible to a scale, consisting usually of a pair of adjustable pivoted legs.
any of various calibrated instruments for measuring thicknesses or distances between surfaces, usually having a screwed or sliding adjustable piece.
thickness or depth, as of paper or a tree.
Usually, calipers. the pincers of an earwig.
the part of a disc-brake assembly that straddles the disc and presses the brake pads against it.
a similar part used with a hand brake on a bicycle.