Use it as it comes with a flat back, or design your own filework with this precision milled backspine, made from Red G10. These DIY backspines work with the standard barrel standoffs (included in FL001 kit) and will close the back of your folder tight. With a little imagination and elbow grease, these can be easily filed into any of the classic fileworking patterns.  

Specifications
Fits Model = FL001
Material = G10
Color = Blue