I have this Invicta watch with a metal band that needed resizing.  I hate having to pay $10 for the big dope at the watch place to re-size my watches, plus he never gets it quite right and I'm left with a slightly loose watch!  So, I decided to get this thing.  It's cheap, and it works.  I thought, upon close inspection of my watch, that I needed a tiny screwdriver thing: If you look really close at those pins on your watchband, you can kinda see that it looks like a slot at one end and I thought a screwdriver was required.  Not so.  I took a chance and plunked the watch band down on this thing, screwed in the pin thingy, and out popped the pin!  On the underside of your watch you may see little arrows: this indicates the direction that the pins should pop out, NOT where you should place the pin on this device.
It removes pins with no problem, and I was able to also use it on the tiny retractable pin things holding the band to the metal clasp to resize it there as well.
My only complaint is that if you are not careful you may scratch your watch band, slightly.  I'm not a fancy-lad, so I don't care.  Also, when putting the pins back in - I used a small hammer, and that left a small scratch too.  But like I said, I really don't care.  I'm just thrilled my watch now fits nice and snug on my wrist, and if I need to change the size in the future (if I lose weight - yeah right....) then I can with no problem or additional cost.  Hooray for this cheap plastic thing!!!