【Main Unit Size】 Width approx. 75mm Height approx. 170mm Length approx. 【Weight】 Approx. 560g 【Accessories】 12 types of adapter metal core chucks included (Chucks of adapter chucks: hardened metal) Chucks ① Front 50mm Back 48mm Chucks ② Front 46mm Back 44mm Chucks ③ Front 42mm Back 40mm Chucks ④ Front 38mm Back 36mm Chucks ⑤ Front 34mm Back 33mm Chucks ⑥ Front 32mm Back 31mm Chucks ⑦ Front 30mm Back 28mm Chucks ⑧ Front 26mm Back 24mm Chucks ⑨ Front 23mm Back 21mm Chucks ⑩ Front 20mm Back 18mm Round type 25mm x 1 Weight type 45mm x 1 【Product Description】 This is a compact watch tool that allows you to easily close the case back of your wristwatch yourself. This is a useful tool that allows you to easily close the case back of your wristwatch yourself. 【How to Use】 ① Select the chucks that fit the cover glass and case back of your watch. Set them under the case back closing pliers. ② Place the watch face down (dial side down) on top of the chucks. ③ Slowly squeeze the handle, pressing the chucks onto the case back surface. 【Precautions】 * Be sure to select a chuck for the bottom that is larger than the glass surface so it does not hit it.