I had a big project to do. New 1/2" subfloor on 1750 sq. ft. Feet to reinforce original sponge OSB subfloor. I'm not getting any younger and found this screwdriver after seeing it on a home renovation TV show. The price was right and after reading the instructions it was verified. WOW that's easy on the back and saves a lot of time! I use a square head screwdriver and 1 1/4" screws. The magazine is easy to load and you can pierce 50 bolts before you realize it. Yes it's a little annoying as you have to be almost vertical to line up the bit with the screw or it won't go all the way in, but once you get the rhythm you'll be an expert in no time. This pistol is well made and the system works. Don't wait like me!