Basic Major Diameter: 1

1 1/8-7 x 4 Socket Cap Screw Alloy

7/8-9 x 5 Grade 8 Hex Cap Screw Yellow Zinc Plated

1/16 x 12 High Speed Aircraft Bit Cobalt

7/8-9 x 7 Socket Cap Screw Alloy

63/64 x 6 Reduced Shank Drill Bit Cobalt (1/2 Shank) 3/4-10 Hex Tap Bolts 18-8 Stainless Steel Basic Major Diameter: 163 64 x 6 Reduced Shank Drill Bit Cobalt (1 2 Shank) . Expands the size range capacity of a 1 2 inch portable drill chuck. Common flute and overall length for minimal adjustment during tool changes. Precision ground for high degree of concentricity between shank and body diameter. Ideal for drilling in low and medium tensile strength materials.