3/4-10 x 10 A307 Grade A Carriage Bolt Zinc Plated

1/2-13 x 9 1/2 Socket Cap Screw Alloy

3/4-16 x 3 Socket Cap Screw Alloy

or even if you’re just a do-it-yourself enthusiast

5/8-11 x 5 1/2 Hex Cap Screw SS 316 (A4)

7/8 x 12 High Speed Long Boy (1/2" Shank) 10-32 Socket Cap Screws Alloy 3/4-10 x 10 A307 Grade7 8 x 12 High Speed Long Boy (1 2" Shank) . Straight shank to 1 2 1 2 reduced shank for sizes above 1 2 M2 high speed steel Sharp cutting edge to drill in many different materials: Mild Steel Cast Iron Aluminum Wood Extra length flute with continuous cutting edges for drilling deep holes and fast chip removal Reduced shank fits all drill motors with 1 2 chucks Non slip grip prevents the bit from spinning in the chuck