Unless you intend to be in the watch repair business, this tool kit is a steal!!  Wanted to change the battery on my Fossil watch; had no idea how to do it (has a funky back, not an easy pop-off).  Watched a You Tube video...showed all the tools needed.  Looked up watch kit on amazon...found this, exactly the items I needed, and bing, bang, boom, in 15 minutes and only 10 dolllars later for 2 batteries my watches were up and running again.  It would have cost me $25-$30 for one battery at the repair shop, so for that amount of money, I can keep doing it myself.  For those who claim "it broke the first time I used it", you must have been trying to change a tire instead of a battery.