High Precision-High precision manufacturing, premium materials, high precision.No burrs when cutting materials.Various Sizes4 PCS 1/4 inch Woodworking Copy Cutter (4 sizes) , blade diameter 1/2 in. Blade length 10mm, 20mm, 25mm, 38mm.High Quality Material- C3 micro-grain tungsten carbide blades, high quality alloy steel body. Heat resistant teflon coating.Widely Used-Useful for trimming, grooving, etc. Such as DIY project, lettering and other template work, Suitable for solid wood, particle board, MDF, plywood, etc. Create very smooth cuts.Note-Designed for handheld and table-mounted routers, it cannot be used in power drills.Specifications:Shank Diameter: (1/4 inch) 6.35mm.Diameter blade width: (1/2 inch) 1.27 cm. Blade length: 10 mm, 20 mm, 25 mm, 38 mm. Material: alloy steel. Weight: 130 g. Blade: Made of high quality C3 micrograin tungsten, Teflon coated heat-resistant, stainless, anti-corrosion and durable. Shank design: Smooth shank, chamfer design, easy to install tips.