Features: Nice for deepening relationship: You can send these pocket slide calipers to your friends, family members, relatives, colleagues, and neighbors as useful gifts, bringing convenience to their work and improving your relationship. Practical to use: These measuring calipers are pocket and portable for your simple carry and storage. What's more, they are beautiful and retro, convenient to measure, making it easy for adults, and teenagers to complete their work, homework, art projects and more. Specifications: Material: solid brass Color: as pictures shown Size: about 10 cm/ 4 inches in total length, 3.5 cm/ 1.38 inches in width, whose jaw is approx. 21 mm Weight: about 42 grams/ 1.48 ounce Package includes: 4 x Pocket slide calipers Notes: Manual measurement, please allow slight errors on size. The color may exist slight difference due to different screen displays. Double Scales to Use: these vernier calipers are designed with double scales, available in mm and inch scales, saving your time, thus measuring quickly, bringing large convenience to your work Ideal for Measuring Jewelry: the buttons on these pocket rulers make it easy for you to push and pull the ruler, ideal for you to measure the inside or outside diameters of wood beads, glass beads, rings, gems, jewelry and other items Sturdy and Vintage: adopting solid brass as material, these sliding calipers are well made and serviceable, firm and hard, well crafted, resistant to distortion, fade and rust, non magnetic, shiny and glossy, full of retro atmosphere, will serve you for a long time Double Scales to Use: these vernier calipers are designed with double scales, available in mm and inch scales, saving your time to convert units, thus measuring quickly, bringing large convenience to your work