440MZ-225RL Depth Micrometer 52124

The Starrett 440, 440M, 445, 445M Series Depth Micrometer features a combination ratchet and speeder, ring-type locknut, ratchet stop and locknut. 0-225mm Range, 63.5mm Base, 9 Rods, Ratchet Stop, Lock Nut, Case.


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  • The depths of holes, slots, shoulders and projections can be measured with these fine tools
  • 2-1/2" (63.5mm) base and 1/8" (3.2mm) diameter measuring rods
  • Combination ratchet and speeder for uniform pressure and quicker adjustment
  • Ring-type knurled lock nut for quick and sure locking


  • Micrometer Type: Mechanical
  • Range (mm): 0-225mm
  • Graduations (mm): 0.01mm
  • Base Length (mm): 63.5mm
  • Lock Nut Type: Ring Type Knurled
  • Measuring Rods (qty): 9
  • Rod Diameter (mm): 3.2mm
  • Thimble Type: Ratchet
  • Case Type: Padded Case
  • Accuracy (mm): Mic head '+/-.0025mm; Rods '+/-.005mm