443Z-3RL Micrometer Depth Gage with Half Base 52171

The Starrett Micrometer Depth Gage with half base features a combination ratchet and speeder, ring-type locknut, ratchet stop and locknut. 0-3" Range, .001" Grad, 3 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" (50mm) half base permits measuring depths of holes and slots close to shoulders and between obstructions
  • Combination ratchet and speeder for uniform pressure and quicker adjustment
  • Rods have individual length adjustment and are 5/32" (4mm) in diameter
  • Ring-type knurled lock nut for quick and sure locking


  • Micrometer Type: Mechanical
  • Range (in): 0-3"
  • Graduations (in): .001"
  • Base Length (in): 2" - Half Base
  • Lock Nut Type: Ring Type Knurled
  • Measuring Rods (qty): 3
  • Rod Diameter (in): 5/32"
  • Thimble Type: Ratchet
  • Case Type: Padded Case
  • Accuracy (in): Mic head +/-.0001"; Rods +/-.0002"