1-1/4"-100 HSS Single Flute Countersink Quantity:1 They are made from M42

They are made from M42 8% cobalt and are manufactured to NAS 965 Type "D" specifications

the 4 and 6 inches files are single cut

Part Number: 75C450HCSSS/316

Part Number: EZ-21470

Part Number D/ACOX

1-1/4"-100 HSS Single Flute Countersink Quantity:1 They are made from M42Product Description Single flute countersinks are ideal for chambering, deburring, and countersinking. They provide a smooth finish on a variety of materials. Brand Drill America Part Number DEWSFC1 1 4 100 Size 1 1 4" 100 Material High Speed Steel Finish Uncoated (Bright) Body Diameter 1 1 4" Shank Type Round Countersink Angle 100 Shank Size 3 4" Length 3 3 8" Number of Flutes 1