Caliper for check the bead size a bead sizer

Caliper,Measuring tool for measuring beads. The amount of jewelry pearls is always in millimeters. But with a ruler that is difficult to measure. Whether its stone bead 6mm or 8mm is great, it is easy to find with the sliding knife. Simple pearl between both webs take and read from calipers. A super jewelry tool that is of good use for many other things. The brass-colored calipers is about 100mm long, 30mm wide and 2.5mm thick. The slide gauge is easy to operate with one hand, that the Pearl safe is in one hand.