The wide range of applications allows it to be used in a variety of workplaces. Different specifications make it possible to meet different work requirements. Strong stability and sharp cutting make it very reliable and efficient. Professional and exquisite workmanship makes it have unicompatiblem particles and hard texture. Made of brown corundum and high speed steel, it is very durable to use. There are three specifications compatible you to choose from: 4mm, 4.8mm, 5.5mm. It is suitable compatible metal polishing like chainsaw, jade, wood, mold, steel and so on. Item Name: Chainsaw Whetstone Material: High Speed Steel,Brown Corundum Product Quantity: 5Pcs A: 4mm, B: 4.8mm, C: 5.5mm Product Shank Type: Round Shank Features: Hard Texture, Long Service Life, Unicompatiblem Particles Size Details: A: 4.5cm x 0.4cm x 0.4cm/1.77" x 0.16" x 0.16" (Approx.) B: 4.5cm x 0.48cm x 0.48cm/1.77" x 0.19" x 0.19" (Approx.) C: 4.5cm x 0.55cm x 0.55cm/1.77" x 0.22" x 0.22" (Approx.) Shank Diameter: 0.3cm/0.12" (Approx.) Head Length: 2.2cm/0.87" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Precautions: Electric chain saws generally choose a diameter of 4.0mm. Small chain saws generally choose a diameter of 4.8mm. Large chain saws generally choose a diameter of 5.5mm. Package Includes: A: 5 x 4mm Chainsaw Whetstones or B: 5 x 4.8mm Chainsaw Whetstones or C: 5 x 5.5mm Chainsaw Whetstones