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ID Twist Drill Case

Tom Stallings

Plastic
Joined
Mar 10, 2009
Location
Pinetops, NC USA
I recently bought a small case of twist drills with manufacturers name of Whitman and Barnes.

There are 8 drill in the case, each different, and each is cut down to the center line of the drill.

Could this be a salesman demo case showing the different drill construction?
 

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The inner flap of the case has printing that seems to describe each type of bit, but the picture is unclear, so I can only read a few letters.

I have D bits, but none of them are made from twist drills.

Larry
 
I also have D bits / half round drills and none of those are made from spiral fluted drills.

IMO that's a salesmans sample / demo case to show the different helix shapes and web thicknesses etc etc.
 








 
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