1. Steel pins resist deformation for precise measurement data 2. Rotating gauge with positioning slots. Five-stage design clearly indicates chain wear 3. Slot design prevents measurement inaccuracies from loosening 4. Aluminum alloy construction offers high strength, lightweight durability, and long-lasting reliability 5. Materials: aluminum alloy, steel 6. Size: about 13.6 x 2.9 x 2.3 cm 7. Weight: standard: about 41g; hollow: about 30.5g
