Specs: Description: Depth Gauge And Flat File , The Flat file is made from high-quality heat-treated steel , The depth gauge tool is set to the precise engineered .025″ depth for all saw chain pitches , A sharp chain is a safe chain; check chain frequently and sharpen as needed , Helps maintain and increase the life of your saw chain , Precision engineered for smooth and efficient flattening of depth gauges , An essential tool when sharpening your saw chain; lower depth gauges allow the chain to “bite” the wood Replaces OEM Numbers: Oregon: Depth Gauge and Flat File Compatible With/Replacement For: The depth gauge tool eliminates the guesswork when filing down your chain’s depth gauges