Oregon 5/32 in. Round Saw Chain Files (2-Pack), for sharpening 3/8 in. low profile and 1/4 in. pitch saw chain in the Chainsaw Accessories department at Lowes.com
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
File size for a pole pruner? | Arborist, Chainsaw & Tree Work Forum
Oregon 70503T Round Files, 3/16", 4x3-Pack – American Forestry
Husqvarna X-Cut SP33G 3/8-in Pitch 0.05-in Gauge Replacement Chainsaw Chain for 16-in Guide Bar 581643602 | Réno-Dépôt