5 model

Free

4x5 WIDE Pinhole, supports graflock backs

Thingiverse

Free

Lego Technic 2x2 Beam Alternating Axlehole and Pinhole

Thingiverse

Free

Pin Hole Puzzle (Unknown)

Thingiverse

Free

Telescope Pin Hole Sun Finder

Thingiverse

Free

Hitch with pin hole

Thingiverse