#1 Square Drive - All #7 diameters and 9 x 3 1/2 #2 Square Drive - 9 x 4

9/16-12 x 7 1/2 Socket Cap Screw Alloy

17/64 Heavy Duty Jobber Drill Bit

3/4-10 x 7 1/2 Hex Cap Screw SS 316 (A4)

#8 x 6 High Speed Aircraft Bit Cobalt

#11 x 6 High Speed Aircraft Bit Cobalt (6) 3/4-16 Grade 5 Hex Cap Screws Zinc Plated #1 Square Drive - All#11 x 6 High Speed Aircraft Bit Cobalt . Manufactured to NAS 907 Type J specifications Jobber flute lengths for drilling holes in hard to reach places Heavy duty construction for portable or machine drilling For use in drilling in high tensile strength alloy steels, stainless steels, titanium and other difficult to machine materials Made in the USA