Driver Bits Philips Screw Size

PhillipsDrive size
Screw DiameterMachine ScrewsSheet Metal ScrewsWood screws
FlatRound
#2#1#1#1#1
#3N/A#1#1#1
#4#1#1#1#1
#5N/A#2#2#2
#6#2#2#2#2
#7N/A#2#2#2
#8#2#2#2#2
#9N/A#2#2#2
#10#2#2#3#2
#12#3#3#3#3
#14N/A#3#3#3
1/4″#3N/A
5/16″#4
3/8″#4