【Easy Watch Battery Replacement Kit】-- This kit includes case opener, spring loaded pry tool. It can help you open the watch cover to change the watch battery and change the watch band. 【Applicable phenotypes】-- The housing cover is only suitable for the housing cover that opens by twisting, not for other phenotypes that open the housing cover. 【How to use the can opener】-- The use range of the can opener is 15-60mm. Adjust the spacing of the bits by turning the adjustment wheel according to the groove of your housing. Silver color ; earphone size: 74 x 5 x 5mm; meter opener material: stainless steel, color: lake blue, size: 70 x 28 x 10 mm, maximum adjustable width 6 cm, weight: The net weight of the product is about 39 g. How to open the cover: 1. Measure the diameter/size of the back cover of the groove; 2. Choose two or three claws whose opening size is larger than the diameter of the back cover; 3. Unscrew counterclockwise.