For 3/8" Pitch Low Profile Chainsaw Chains. This is a complete Chainsaw Chain sharpening Tool Assembly which is made up of a file handle, a 5/32" ( 4mm ) Round File, and a Chain Sharpening angle Guide Plate which allows you to get the right angle and height first time suitable for use with many Stihl, Husqvarna, Homelite, Ryobi, McCulloch, Jonsered, Partner, Zenoah, Echo, Kioritz, Efco, Emak, John Deere, Oleo Mac, Olympyk, Alpina, Shindaiwa, Einhell, Poulan and Tanaka Chainsaw models as long as you know you need a 5/32" ( 4mm ) file for your saw.