bit holders for sockets and driver bits

Wall-mount holders for sockets and 1/4-inch hex-shank driver bits.

The holders for sockets have engraved lettering. The holders for the 1/4-inch hex-shank bits have pockets to hold label cards.

The OnShape document where all of these holders are defined is at:
https://cad.onshape.com/documents/9c4144bbcaf1bf9353ba543c/v/6143dd58548a0a39954e3f16/e/fc1c8c1116e776312381934f

The code that generates the label cards is at: https://github.com/neiljackson1984/bit_holder_labels.git

TO DO: generate label cards for all of the standard driver bits.

mount holes are for a #8 pan-head screw.
mount holes are spaced at a whole number of inches, on-center.
Insertable printed paper labels are 9 millimeter x 12 millimeter rectangular pieces of paper. The label pockets have retention lips along two opposite sides - the edge of the printed label cards fits under the retention lips to prevent the card from falling out.

These holders are intended to be mounted to a rectangular 1-inch grid of holes.
The mount holes in the holders are, by design, not (necessarily) centered horizontally on the holder. The horizontal locations of the mount holes are set so that the distance from the left-most face of the holder to the left-most mount hole is constant, so that multiple holders can be arranged neatly like left-aligned lines of text on a page.