Moore & Wright 255-01DDL Digital External Tube Micrometer 0-25mm/0-1" 

Features Standard: DIN 863 Digital micrometer for measuring tube wall thickness With spherical anvil With constant force ratchet thimble Chrome plated frame Functions: mm/inch conversion, on/off, zero-setting, battery low indication, hold, 0...ABS Packed in plastic box with standard and battery cover key