Product Details:

Fractional Sizes.

The CRL Sure Grip Shank Drills extend the range of 1/4 inch (6.4 millimeter) chucks through 1/2 inch (12.7 millimeter) drilling capacity with reduced 1/4 inch (6.4 millimeter) shank for use in hand drills.

Size: 1/2 in (12.7 mm)