【High Precision】 -High precision manufacturing, superior quality materials, high accuracy. No burrs when cutting materials. 【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 projects, lettering and other jig work. Suitable for solid wood, particle board, MDF, plywood, etc. Creates very smooth cuts. 【Note】 -Designed for handheld and table-mounted routers, it cannot be used in electric drills.Features: Shaft diameter: (1/4 inch) 6.35 mm.Blade diameter: (1/2 inch) 1.27 cm. Blade length: 10 mm, 20 mm, 25 mm, 38 mm.Material: steel alloy.High Quality:Blade design: Made of high-quality C3 micrograin tungsten, heat-resistant Teflon coating, rustproof, corrosion-resistant and durable. Shaft design: smooth shaft, chamfered design, easy-to-install tips.Widely UsedPractical for trimming and grooving. Ideal for DIY projects, lettering and other stencil work.NOTE: Designed for handheld and tabletop routers, cannot be used with electric drills and drills.NOTE:Designed for handheld and table-mounted routers, it cannot be used with electric drills and power drills.The flush trim cutter must be fully inserted and tightened. Contents:4 x Straight Grooving Cutters