1 1/4-12 x 4 Socket Cap Screw Alloy

accurate and tough drilling through all aggregates

1/2-13 x 6 Hex Cap Screw SS 316 (A4)

7/8-9 x 2 3/4 Socket Cap Screw Alloy

7/16 x 12 High Speed Long Boy Hex Washer Head Metal-Panel Screws 316 Stainless Steel 1 1/4-12 x 4 Socket7 16 x 12 High Speed Long Boy . 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