proper step drill for gpc-1000 scales

[mldolan]

been searching a few sites but can't find what I am looking for. I purchased what I thought was the correct one, but it is too small. this is what found at a knifemaking website, and it seems that the KKTS56 is the way to go. do you agree? the following is what I found at one of the sites. do I need socket or button head?







The letters "S" and "B" in our part numbers are used to designate the following: S = socket head cap screw, B = button head. The pilots on these drills are 1/4" long.


KKTB56
#19 (.166) body x .093 pilot This is for setting a button head 2-56 screw
$15.95/ea




KKTS56
5/32 body x 3/32 pilot This is for setting a 2-56 socket head cap screw.
**This is the one for making kit handles with.
15.95/ea




KKTS56
5/32 body x 3/32 pilot This is for setting a 2-56 socket head cap screw
15.95/ea



KKTS72
#31 (.120) x .075 This is for setting a 1-72 socket head cap screw
15.95/ea



KKTB80
7/64 head x.065 pilot This is for setting a button head 0-80 screw
15.95/ea



KKTS80
#38 (.1015) body x .065 pilot This is for setting 0-80 Socket head cap screw
15.95/ea


Thanks
Mike in MD