1/4 x 1 1/4 Mushroom Spike Zinc Plated (100)

The threaded stud version is available in eight diameters and multiple lengths

5/8 x 12 ITM SDS Plus Hammer Drill Bit

1/4 x 2 1/2 Round Split Drive Anchor Zinc Plated (100)

#6 Heavy Duty Drill Bit - Stubby Length

43/64 x 6 Reduced Shank Drill Bit Cobalt (1/2 Shank) 12" Aircraft Bits - Fractional 1/4 x 1 1/4 Mushroom43 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.