9-piece diamond chainsaw chain sharpener set, sharpening stones, available in 3 sizes: 4.0, 4.8, and 5.5 mm.

Multiple Sizes: This set includes nine 3 x 4 mm whetstones, three 3 x 4.8 mm whetstones, and three spare 3 x 5.5 mm whetstones. Suitable for sharpening gasoline and electric chainsaw chains. Easy Sharpening: Sharpen chains easily without disassembly and reassembly. Make your chainsaw look brand new in minutes. Premium Materials: This chain sharpening tool is made of premium materials. The evenly distributed abrasive on the sharpening head makes operation easy and ensures durability. Easy Sharpening: Sharpen chains easily without disassembly and reassembly. Make your chainsaw look brand new in minutes. Chain sharpening is easy and simple: Sharpen chains easily without disassembly and reassembly. Your chainsaw will be as good as new in minutes.