Get precise measurements of your beads and components with this lightweight plastic caliper. If your beads got jumbled together and you need to separate them by size, or if you need to measure a bead for a repair piece, this is a wonderful tool to have on hand. This caliper measures by inches and millimeters at the same time, giving you exactly the information you need. You can use this caliper to measure items up to 3.25 inches or 80mm in size. The compact and lightweight design is perfect for travel.