Perfect Chain SharpenerThis chain sharpener kit contains 10 commonly used sharpening tools to sharpen your chainsaw chain blades for optimum cutting performance in minutes to save energy and time. High Quality- 5/32 (4.0mm), 3/16 (4.8mm), 7/32 (5.5mm) round files designed with durable steel and can be used on a wide variety of string and pitch types; interchangeable handle works with all files. Efficient and Stable - File guide designed with effective quick lock/release mechanism for stability and control; Etched angle markings help ensure precise alignment when filing. Scientific Design- The end of the whetstone with handle design, easy to use, which allows the user to 'operate directly on the chainsaw, without accidentally hurting your finger. Tool set includes:- 3 round files, file holder, 6 inch flat file, depth gauge, cleaner bar groove, quick check gauge, hardwood handle and pouch (orange); Detailed, clear and easy to follow instructions.