| 
                 3100 Series Reference Masters are offered in 5
                sizes to accommodate our No. 2900 series Large Diameter Groove
                Recess Gages.  They feature a depth range from 0 to 3"
                and 7/16" rack & pinion fine adjustment for fast and
                easy setting.  The range blocks are hardened and precision
                ground and the Reference Master body is made from precision
                ground and stress relieved alloy steel tubing.  tTis
                Reference Master may be used with both the No. 2920, 1" diameter
                and No. 2930, 1/4" diameter measuring tips supplies for the
                2900 series gages.
                |