Cut and pasted from this thread:
https://www.stovebolt.com/ubbthread...g&topic=0&Search=true#Post350137You can get just the bits, with 1/4" hex to use in an insert type screw driver, from McMaster Carr.
http://www.mcmaster.com/ All 5 sizes for less than $6 total.
part numbers for the short ones:
7188A31
7188A21
7188A23
7188A24
7188A32
longer ones available, look at the page mentioned above.
I have one of the Snap-on ratcheting screw drivers, and these bits work great with that.
If you want the best you can get go for the Snap-On clutch head screwdriver set. I have used some and they are very nice.
Grigg