This number two size Philips is perfect for those basic sized Philips screws, which are the most common.For smaller Philips screws you'll need a number one. For the big screws you'll need a number three.I don't work with my hands professionally, but when I do pick up a tool I can instantly recognize quality.I've picked up lots of different screwdrivers throughout my life, and none have surpassed Klein in terms of that quality feel.This is almost perfect in it's design and quality. It probably even deserves a place in a museum.As far as screwdrivers go though, you don't really need perfection, and this is as close as you will likely get.Made in the U.S.A.-notes:The #0 Phillips head drivers fits screw numbers 0 and 1. The #1 Phillips head fits screw numbers 2, 3 and 4. #2 Phillips head screwdrivers fits screw numbers 5, 6, 7, 8 and 9. The #3 Phillips head works on screws with the numbers 10, 12, 14 and 16, while the #4 Phillips head corresponds with screws numbered 18, 20 and 24.The numbering system is a little hard to keep track of but is one way to determine which Phillips head driver works with which screw. The other way requires simple trial and error.