COUNTERSINK SET 4PC IRWN *Brand Name: Irwin *Countersink Size: #6, #8 and #10 *Material: High Speed Steel *Product Type: Countersink Set *Number in Package: 4 pc *Usage: Wood *Overall Length: 6 in. *Shank Type: Quick-Change Hex Shank *Packaging Type: Clamshell *Shank Diameter: 1/4 in. *Discovery SUP