【Easy Watch Battery Replacement Kit】-- This kit is composed of a watch case opener, a watch case holder and a tweezer.It helps you open the watch cover to replace the watch battery and clean the dust inside the watch.The tweezers are used to remove the battery. 【Applicable watch type】-- The watch case opener is only suitable for the watch cover that opens by twisting and is not applicable to other types of watches that open the watch cover.watch. 【How to use the watch case opener】 -- Watch cover opener The use range is 15-60mm, and the drill bit spacing suitable for the watch cover can be adjusted by rotating theadjustment dial. 【The purpose of watch case holder】 -- The case holder can help fix the watch and reduce the risk of slipping and scratching the watch.It is suitable for watches of different sizes and can be used for watches with a diameter of up to 50mm. 【Picture User Manual】-- The kit comes with a user manual.Detailed pictures tell you the correct usage method, avoid damage to your watch by wrong operation, and help you solve the watch problem at home.