and its jaws open into lock position when placed within a hollow surface

3/4-10 x 4 Flat Socket Cap Screw Alloy

3/4-16 x 6 Grade 8 Hex Cap Screw Yellow Zinc Plated

1-8 x 5 A307A Hex Tap Bolt Zinc Plated

1/4-20 x 2 Combo Flat Sleeve Anchor Zinc Plated (100)

1 x 6 Reduced Shank Drill Bit (1/2 Shank) 7/8-14 Grade 8 Hex Cap Screws Yellow Zinc Plated and its jaws open into1 x 6 Reduced Shank Drill Bit (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.