Soul Pilot Pin kits include 40 pins and washers. That is enough to replace every pin on a set of Soul Pilot pedals. Pins are M4x.7 threading, so the can be used in most pedals when more grip is needed.
The pins protrude by 5mm and taper to 2.2mm in diameter at the ends. The typical Major diameter of an M4 pin is 4mm. This reduction in diameter at the business end provides more bite by concentrating pressure in a smaller area.
These pins install from the top down, but by using a 2.5mm allen key from the reverse side. This saves weight over through-pins by eliminating a heavy bolt head, and then goes one better by never requiring you to pull a bent pin through the threaded hole which compromises threads and leads to pins that frequently fall out.