Permits direct reading of the distance between two surfaces.  Longer jaws allow for greater accessibility and simpler measurement of larger work pieces.  Hardened stainless steel throughout ground and lapped for accuracy.  Machine divided and engraved from master for extreme accuracy.  Easy-to-read, long verneir scales have wide spaced clear, crisp black engraved graduations.  Surfaces are hard chrome plated for resistance to rust and stain.  Easier & faster reading with maximum accuracy.  Inside measuring nibs with adjustable vernier plates.  Comes complete with fitted case.