Small Hole Gage Set, Number of Pieces 4, Gage Deep or Shallow Holes, Slots and Similar Work, Measuring Ranges/Probe Depth 0.125 to 0.200/0.880, 0.200 to 0.300/1.200, 0.300 to 0.400/1.600 and 0.400 to 0.500/1.600 In, Fully Hardened Gaging Surface Full Round with Flat Bottom, Includes Fitted Case