[Easy Watch Battery Replacement Kit]-- This kit consists of watch case opener, spring bar tool, cleaning cloth. It can help you open the watch cover to replace the watch battery and change the watch strap. Anti-scratch film function: can help reduce the risk of the watch being scratched by the caseback removal tool. Applicable phenotypes: The Lid Detector only works with swivel-open lids, not other lid-open phenotypes. Use of the case-back decapper: The case-back decapper can be used in a range of 15-60 mm. Adjust the drilling distance to fit the grooves on the back of your case by turning the dial. Colour:blue Material:Metal Size:7 x 3.8 x 1.4cm Package Contents: 1 x Watch tool case opener 1 x Screwdriver(random color style, don't accept the specified) 1 x Cloth(random colors, don't accept the specified color) Only the above package content, other products are not included. Note: Light reflection 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.