These are all
bitstocks for use in a brace, and have a square ended shank.
If anyone has other bitstocks that they can add to this list, or better
pictures than I have here, please submit them for addition to the
page.
Terminology:
Spur = protruding cutting edge that scores the outer dimension of the
hole.
Lip = cutting edge that removes the waste at the bottom of the hole.
Forstner-pattern bits
Leftmost: Bridgeport Gun Implement Co (marked B.G.I. Co) has no centre
point and only one cutting lip.
Middle bit has no centre point and two cutting lips.
Rightmost has a centre point and two cutting lips.
Die Stocks
This die stock takes standard (modern) 1 inch dies.
Countersinks
Left and middle: Rose head countersinks.
Right: "snail" countersink
Screwdriver Bits
Left: Roberston #1
Centre & Right: flat bits marked 8 and 10 respectively.
Reamers
1 of
4 
