Features:This is a set of sharpening shank tools, which are used for polishing and grinding.Made of strong and harden alloy, these sharpening shanks are of high hardness, very durable, and can stand longtime wear and tear.The wheel heads' even and homogeneous distribution of granularity makes the polishing work just a breeze, and the abrasive grains are not easy to fall off, so that the service life is long.Comes with 50pcs a set, so it is practical and economical.It has a wide applications, which mainly used for polishing or modelling on the surface of the plastic, metal and wood, or other situations. Specifications: Material: Emery, Alloy Color: As Picture Shown Shank Diameter: 3mm / 0.118'' Grinding Head Diameter: 4mm / 0.157'' Total Length: 46mm / 1.811'' Grinding Wheel Effective Length: 13mm / 0.512'' Item Quantity: 50pcs/Set Package Weight: Approx. 215g Package Included: 50 x Grinding Sharpening Tools Features Application: This is a set of sharpening shank tools which used for DIY production and polishing like acrylic, plastic, wood, metal, mold polishing, power tools and other materials for refurbishing, polishing, grinding and sanding. High Quality: This mounted grinding points are made of strong and harden alloy material, high hardness, good wear resistance which can be used to clean burrs, flash and welds produced by various processes. Easy to Use: The wheel heads' even and homogeneous distribution of granularity makes the polishing work just a breeze, and the abrasive grains are not easy to fall off, so that the service life is long. Package Include: This grinding set comes with 50pcs, it's practical and economical. Quality Assurance: All of the product are strictly inspected before shipment, so please purchase with confidence. Please contact us if there is a defective product due to manufacturing reasons.