COUNTERSINK HSS 3/8"IRWN *Brand Name: Irwin *Drill Bit Diameter: 3/8 in. *Material: High Speed Steel *Product Type: Countersink *Number in Package: 1 pc *Usage: Metal, Wood and Plastic *Overall Length: 1-5/8 in. *Shank Type: Round Shank *Packaging Type: Carded *Shank Diameter: 1/4 in. *Includes a black oxide finish for added corrosion: Includes a black oxide finish for added corrosion resistance *Precision ground 82 degree tip for countersinking: Precision ground 82 degree tip for countersinking most machinable metals, wood or plastic *High speed steel for increased durability *Five flute design reduces vibration for smoother drilling *Vendor Internet Sales Policy: Sale of this product on third-party online marketplaces (eg. Amazon, eBay, Walmart) or member-owned websites is prohibited without direct written authorization from Stanley Black & Decker.