You would think the important information , like the size capacity of this tool would be displayed first. No it is hidden and you must click a more information button to see it. The maximum size 33mm, my watch is 45mm and you can see the problem. Modern watches are all quite large and this tool is useless for them and I have a few old watches I can use it on but now I can return it or buy another larger one. I have to give the seller low points for the ad, if clear and important information can not be provided by the seller Amazon should require it before they can put anything up for sale. I can't say I'm very pleased now.