Using solid brass as the material, these sliding calipers are well-made, practical, strong and hard, finely crafted, anti-deformation, anti-fading rust, non-magnetic, shiny shiny, full of retro atmosphere, can serve you for a long time. This jewelry caliper measuring tool has clear proportions, high precision reliability, making it easier to get accurate measurement readings; in addition, is lightweight mini, allowing carry bag or pocket without taking up too much space vernier feature dual scale design with millimeter inch scales, saving time quick measurements great convenience your work There 4 mini tools package, each total length about 10 cm / inches, 3.5 1.38 inches wide, jaw 21 mm weight 42 g 1.48 oz. practical meet daily needs buttons on rulers allow push pull ruler easily, ideal inner outer diameters wood beads, glass rings, gems, other items. Colour:As Shown Material:brass Package Contents: * caliper Only above content, products not included. Note: Light reflection different displays may cause color item picture little from real thing. allowed error +/- 1-3cm.