Features: 3 sizes grinding head diameter:5/32''(4.0mm), 3/16''(4.8mm), 7/32''(5.5mm).Total length:1.77''. Different size meet your diverse needs. Crafted with emery, these grinding heads are wear resistant and resistant to pressure and impact, ensuring extended use without cracking. Designed for DIY enthusiasts and professionals alike, our grinding heads are perfect for sharpening chainsaw chains of various sizes, making them a must have tool for anyone working with chainsaws. Whether you are working with electric chainsaws, small oil saw, or large oil saw, our versatile grinding heads in three different sizes have got you covered. Achieve precise and efficient chain sharpening. Not just limited to chainsaw chains, these grinding heads can also be used for polishing and grinding a variety of materials such as glass, ceramics, stone, and wood. Explore a wide range of applications for your projects. Specifications: Material:Emery 3 sizes Grinding Head Diameter: 5/32''(4mm), 3/16''(4.8mm), 7/32''(5.5mm) Quantity:9Pcs (3Pcs Each Size),36Pcs (12Pcs Each Size) Package Includes: 9Pcs or 36Pcs Diamond Chainsaw Sharpener note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.