1/2"-90 HSS 6 Flute Chatterless Countersink BoltsandNuts.com Part Number D/ARSD3/8X33/64

Part Number D/ARSD3/8X33/64

Part Number DWTSH1-3/4-20

Two "wings" on the base of each shanks help it resist being twisted or pulled out of the handle

Drill Bit Size: 49/64"

not the corners

1/2"-90 HSS 6 Flute Chatterless Countersink BoltsandNuts.com Part Number D/ARSD3/8X33/64Product Description 6 Flute chatterless countersinks are designed to provide more metal removes than the 1,2,3 and 4 flute countersinks. They are also more effective on harder materials. Brand Drill America Part Number DEWCHAT1 2 90 Size 1 2" 90 Material High Speed Steel Finish Uncoated (Bright) Body Diameter 1 2" Shank Type Round Countersink Angle 90 Shank Size 1 4" Length 2" Number of Flutes 6