1、Made of good quality elastic rubber (cow rubber band), do not damage for watch. 2、The product is used to easily remove the watch dial protection cover, easy to change the watch glass mirror. 3、Come with 4 different types of watch bezel ring, which will meet your different needs. 4、Come with simple and practical design, convenient for operation. 5、The product is suitable for watchmakers and watch repairing workers to use. 1 x Watch Bezel Ring Opener4 x Die Ring1 x User Manual Item Type: Watch Bezel Ring OpenerMaterial: Soft rubberApplicable Bezel Diameter: Approx. 25 ~ 42mm / 1 ~ 1.7inPurpose: Suitable for opening the outer ring of for Tudor and other famous watches without traceHow to Use: 1. Take out the open loop handle and align it with the watch cover 2. There are other open circles of different sizes in the suit (users can choose the appropriate size for disassembly) 3. Aim at the top cover of the high-end watch, clamp it and unscrew it Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.