Jeweler's 4" Solid Brass Vernier Caliper - SAE & Metric Precision measuring instrument for delicate items - essential tool for jewelers Solid brass is non-magnetic, non-rusting and more gentle than hardened steel calipers Scale marked in millimeters bottom and 1/16" on top; 3/4" jaw throat Length overall 4-1/2", 5/8"W; 1.4 oz Also available in 2" and 3"