1 8 x 1 1 2 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (10) 5 16 18 Grade 5 Hex Cap Screws Zinc Plated Domestic USA Straight shank to 1 2” 1 2” 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 7 8 9 x 8 Socket Cap Screw Alloy 1 8 x 1 1 2 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (10) hardness will range from HRC 31 39