Decimal Equivalent 0.625, Finish - Machining Black, Largest Plug Diameter 5/8 in, Material - Machining High Speed Steel, Measurement System Fractional Inch, Number of Drill Bits 3, Overall Length 2 1/8, Plug Lengths Included 1/2 in, 3/8 in, 5/8 in, Primary Material Application Wood, Smallest Plug Diameter 3/8 in, Shank Hex Size 1/4 in, Shank Type - Machining Hex.5, 0.375, 0.