After selecting your knife it's now time to look through pins and handle materials.  In here you'll start making your knife, yours.  These are 1/4" solid metal pins.  When you make your pick, you get a set of (2) two pins per knife.  
The 1/8" solid pins go well with knives that have a Center Decorative pin whereas the 1/4" are better as a stand-alone option.