DIY tools: making $175 file guide for less than $1 - YouTube
SCOTTCHEN Hardened File Guide Knife Making Tool, File Guide with Carbide Surface for Belt Sander, Knife Makers File Guide : Amazon.co.uk: Home & Kitchen
4" Carbide File Guide - Parallel Edge for Knifemaking| KnifeMaker
SCOTTCHEN Hardened File Guide Knife Making Tool, File Guide with Carbide Surface for Belt Sander, Knife Makers File Guide : Amazon.co.uk: Home & Kitchen