Drill Bit w/Countersink- Distal Steel
FOR 3/8" TAP- CARBIDE
They are solid carbide with an advanced proprietary coated and can be run with no cutting oil.
The O diameter design makes for easy tapping with a built in countersink and a 7/16" shank.
This design allows for smooth operation and full chip evacuation unlike slip on countersink collars that chatter and trap chips in their enclosed design.
The short design and thick shank makes these bits significantly stronger and more rigid, virtually eliminating flex and the resulting walk.