Item Type: Watch Case Open BallProduct Material: RubberDiameter: 7cm/2.8inColor: Blue .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1Repair Tool: Watch case open ball is a fun watch case opener tool that looks like a toy ball, but a professional watch repair tool 2Safe and Reliable: Watch case opener ball is safer to use compared to metal case openers and will not scratch your watch during use 3Durable Rubber: Watch case opener is made of durable rubber, which is strong and durable, rubbing with the back cover of the watch to open the back cover 4Easy to Use: Simply fix the watch on the repair bracket or hold it in your hand, then make the watch rub against the back case and rotate the watch in the direction of the case "open" (directly pry open the back cover of the watch can not be used) 5Pay Attention: Due to shipping needs, you need to inflate the watch open ball yourself before use (the ball needs to be inflated to half full, not too full). If the back cover is too tight, you need to use a wrench type opener, and then use the opener ball