Crescent two claws open: find the card slot behind the watch cover, adjust the distance between the two claws, and turn the watch cover counterclockwise to open the back cover. Two-jaw back cover watch opener: It can open watch back covers with a diameter below 50mm. Color: silver. material: metal. Name: Two-jaw meter opener. Clamping range: 11-50mm Number of steel teeth: 2 Weight: 59g Packing contains: 1 piece/set notes: Due to manual measurement, please allow 1-3mm difference. Because monitors and different lights are different, the picture may not show the actual color of the item. thank you for understanding Due to the difference between different monitors, the picture may not reflect the actual color of the item.