Specs: Description: Flat Files Bulk Box , Recommend for use with a depth gauge tool, eliminating the guesswork; depth gauge tool not included , The Flat file is made from high-quality heat-treated steel , 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 Compatible With/Replacement For: Designed for use in filing down your chain’s depth gauge