Oregon Chainsaw File Guide, Includes 5/32 in. Round Saw Chain File, for 3/8 in. low profile and 1/4 in. pitch saw chain 25894 25894-21 - The Home Depot
Haofy Chainsaw Files Set,Chainsaw Sharpening File Filing Kit Guide Bar Chain Sharpen Depth Gauge Saw Files Hand Tool Set - Walmart.com
Bob Rozaieski Fine Woodworking
Oregon OCS31686 OCS 31686 Saw Chain Filing Guide, 7/32" - Outdoor Power Direct
Veritas Tools - Sharpening - Saw File Holder
Veritas Saw File Holder | Plane Shavings Blog
RWW 154 Using the Veritas Saw Filing Guide - The Renaissance Woodworker