This watch case opener will open most waterproof watch cases.chucks will work on polygonal, slotted, hole, and grooved case back.Made of high quality metal to help form a tight grip when removing the metal case back from waterproof watches.Watch Case Opener Knife: Simply placing the blade under the case back and pry it off, eliminating the trouble of manual opening and protect your hands. Knife and Pry meet the requirements of your watch.Screwdriver: Unscrew the battery fixing screw easily. Different sizes of screwdrivers are suitable for different screws to avoid damage to the watch caused by incorrect size.Tweezers: Take out the battery easily and solve the troubles that are difficult to remove due to the watch's fineness.watch back remover kit basically cover most of the watch repair tools you need, allowing you to maintain watch at home.Colour:silver + yellowMaterial:Metal + PlasticPackage Contents:1 x Watch Case Holder1 x Tweezers1 x Adjustable Case Opener 1 x Watch Back Pry Opener3 x Slotted Screwdrivers1set x Replacement BitsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.