1. SUPERIOR MATERIAL: High accuracy calipers are made from premium aluminum alloy. The surface undergoes anodic oxidation treatment, making it harder, more wear resistant, with good insulating properties and a longer lifespan. 2. EXCELLENT DESIGN: The dovetail jig is created with CNC processing to ensure accurate measurements. Scales are laser engraved for outstanding clarity and durability. The caliper features both metric and imperial scales to meet various measurement needs. 3. PRACTICAL TOOL: The dovetail fixture template allows for the easy production of multiple accurate dovetail joints. Block size can be precisely controlled by adjusting the position of the teeth and milling cutter. It can also be used to set the height of the table saw blade and the depth of the milling drill bit. 4. VERSATILITY: The caliper includes metric tenoning scales of 5, 6, 8, 10, 12mm and imperial scales of 3/16, 1/4, 5/16, 3/8, 1/2 inch. The measurement height scale features metric sizes of 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16mm and imperial sizes of 1/8, 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8 inch. 5. LASER ENGRAVED SCALES: For reliable accuracy, the scales are laser engraved, providing excellent clarity and long-lasting durability. The caliper supports both metric and imperial measurements, adapting to different user requirements.