【High Precision】- High precision manufacturing, premium materials, high precision. No burrs when cutting materials. 【Various Sizes】4pcs 1/4 inch wood router bits (4 sizes), 1/2 inch blade diameter. Blade length 10mm, 20mm, 25mm, 38mm. 【High Quality Material】- C3 micrograin tungsten carbide blades, high quality alloy steel body. Heat-resistant Teflon coating. 【Widely Used】- Useful for trimming, grooving, etc. Such as DIY projects, lettering and other model making, suitable for solid wood, chipboard, MDF, plywood, etc. Creates very smooth cuts. 【Note】- Designed for portable and table-mounted routers, can not be used in electric drills. Specifications: Shank diameter: (1/4 inch) 6.35mm. Blade diameter: (1/2 inch) 1.27cm. Blade length: 10mm, 20mm, 25mm, 38mm. Material: Alloy steel. Weight: 130g. High quality: Blade design: Made of high quality C3 micro grain tungsten, heat resistant Teflon coating, anti-rust, anti-corrosion and durable. Shank design: Smooth shank, chamfered design, easy