4 piece countersink bit set for # 6,8,10, & 12 screws. Also includes the following nut drivers that can be used in these bit holders as well.
7/16", 3/8", 11/32", 5/16" (x 2) & 1/4" (x3) will also come with 7 adaptors to use in the holders. I have 2 complete sets of these available. $15.00 for each set or both for $25.00