Dynamic Power 4X Thick .404 145mm Grinding Disc for 350W Chainsaw Sharpener*This item does not include chainsaw sharpener machine, disk only.This is a set of two vitrified grinding discs for our Dynamic Power 320W chainsaw sharpener.The grinding wheels are .404 Pitch, 100mm diameter 10mm arbour.Product Features:High-quality vitrified grinding disc.404 Pitch grinding disc set145mm diameter, 22.3mm arbourProduct Included:Chainsaw sharpener grinding disc x4Product Specification:Brand: Dynamic PowerPitch: .404Grinding Disc Size: 145mm - 22.3mm ArbourWeight: 0.2Kg each