Professional and exquisite workmanship ensures uniform particles and a hard texture. This product offers a wide range of applications, suitable for various work environments. Multiple specifications allow it to meet different work requirements, providing strong stability and sharp cutting performance for reliable and efficient operation. Made of brown corundum and high-speed steel, this whetstone is highly durable. The set includes three different sizes: 4mm, 4.8mm, and 5.5mm. It can be used as an alternative to a file, effectively sharpening chains without the need to remove them. Suitable for metal polishing on chainsaws, jade, wood, molds, steel, and similar materials. Item Name: Chainsaw Whetstone Material: High-Speed Steel, Brown Corundum Quantity: 3 Pieces Shank Type: Round Shank Features: Sturdy, Easy to Install, Strong Stability Size Details: 4mm: 4.5cm x 0.4cm x 0.4cm / 1.77" x 0.16" x 0.16" (Approx.) 4.8mm: 4.5cm x 0.48cm x 0.48cm / 1.77" x 0.19" x 0.19" (Approx.) 5.5mm: 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 differences in lighting and screen settings, the item's color may vary slightly from the images. Slight dimensional variations may occur due to manual measurement. Precautions: Electric chain saws typically use the 4.0mm size. Small chain saws typically use the 4.8mm size. Large chain saws typically use the 5.5mm size. Package Includes: 3 x Chainsaw Whetstones (4mm, 4.8mm, 5.5mm)