Shelf Pin Hole Size Gauge Paddle
A 110 x 30 mm pocket gauge for older bookcases and cabinets. It has seven chamfered test pegs (4, 5, 6, 6.35 (1/4 in), 7, 8 and 9 mm) that you push into a shelf-pin hole to find its real size. Below them is a matching row of through-holes (printed 0.2 mm over nominal) for checking a spare pin before you buy or print replacements. A V-notch on the edge marks the 1/4 in peg so you can tell it apart from the 6 mm one, and a 6 mm hole lets you hang it on a pegboard.
tool gauge shelf-pin cabinet