Spring Loaded Pearl, Bead and Gem Gauge 20 mm. Capacity

Description

Very accurate, pocket-sized gauges to measure pretty much anything up to 10.0 or 20.0 mm, with accuracy of 0.1 mm.  It is spring-loaded and has a locking screw so that you can set a particular measurement as a reference. That way, you can do quick sorting of beads, pearls, stones, etc. by size.  It has a rotatable dial so that you can always calibrate to "0.0 mm" easily and solid steel push rod and pads for accuracy and durability.  The 20mm. gauge measures about 3 1/4" x 1 3/4" x 1/2". and comes in a padded hard case.  The 10mm. gauge measures 2 1/2" x 1 1/2" x 1/2", also in a padded case.