Starrett 445BZ 3RL Vernier Depth Gauge, Ratchet Stop, Lock Nut, Micrometre Type, 0 3" Range, 0.001" Graduation, 4" Base, 3 Rods, +/ 0.0001" Accuracy

Measurement range of 0 up to 12", and resolution of 0.001" Vernier scale for precise measurements in fine units Includes 1/8" diameter adjustable measuring rods to cover the range Bases and measuring surfaces are hardened, ground, and lapped for durability and accuracy Ring-type knurled lock nut and combination ratchet and speeder for precise measurements