Mitutoyo 329-350-30 Digital Depth Micrometer features interchangeable rods with lapped measuring ends provide a wide measuring range. Rod lengths can be adjusted in 1" or 25mm increments. Features a Ratchet Stop for constant force, a measuring rod clamp, SPC Data Output and comes in a fitted plastic case. This model has a measuring range of ?0-150mm / 0-6" and 6 Rods with a 4" x 6.3" Base.