I decided to change to batteries on my watches and looked at all the tool sets... ratings were on both extremes so I decided to make my own watch repair kit... This tool came in real handy when I need to remove metal bands from the watches to get to the place I could open the back of the watch. I recommend going to you tube to see videos... nothing comes with instructions. I was about to give up on two watches and I saw how to working this tool properly.