Dril Bit 1/4" Countersink 82' Black Oxide *Drill Bit Diameter: 1/4 in. *Material: High Speed Steel *Product Type: Countersink *Number in Package: 1 pc. *Shank Diameter: 1/4 in. *Shank Type: Round Shank *Packaging Type: Carded *Overall Length: 1-17/32 in. *Usage: Metal, Wood and Plastic *Discovery ACC, CON, NBR, SUP