SincereetaliSturdy Retro?: Made of solid brass as material, these sliding calipers are well-made, solid and hard, well-made, resistant to deformation, fading and rust, non-magnetic, shiny and full of retro atmosphereHigh Precision and Easy to Carry?: The scale of this jewelry caliper measuring tool is clear, high precision, accurate and reliable, allowing you to get the measurement data accurately?; In addition, it is lightweight and compact, you can carry it in your bag or pocket, Won't take up much space Dimension Details: 1 x Mini Caliper Measuring Tool, each tool has a total length of about 8cm, a width of 3.5cm, and a jaw of about 21mm, a practical measuring tool that can meet your daily needs. 1 mini outil de mesure d'trier, chaque outil a une longueur totale d'environ 8 cm, une largeur de 3,5 cm, et une machoire d'environ 21 mm, un outil de mesure pratique qui peut rpondre vos besoins quotidiens. Perfect for Measuring Jewelry?: The buttons on these pocket rulers allow you to easily push and pull the ruler and are ideal for measuring the inner diameter of wooden beads, glass beads, rings, gemstones, jewelry and other items.