Pocket-Size Micro Divider Caliper is 40% smaller than standard analog calipers. Perfect for measuring small wood-turnings and any other project requiring precise replication of sizes and distances, including transferring reference points from blueprints or plans to a model, setting and repeating bulkhead and aircraft wing rib spacing, and more. All-steel divider is 4-1/4" long and measures from 0 to approximately 2". Best of all, no batteries are required!