Function: Suitable for all types of cutting and engraving machines. For finishing wood edges. Suitable for edge trimming, 3D corner beveling, and grooving. With a ball bearing for precise cutting of your wood edges. High-Quality Material: Router bits made of ground tungsten steel, sharp and durable, precisely balanced for smooth operation. The shank is made of 45-gauge steel for very high strength and resistance to deformation. Use: Flush trim router bit shank useful for cutting, grooving, etc., such as DIY projects, can be used for finishing a wide range of materials, including solid wood. Offers great comfort for your daily carpentry work. Tips: Copy router bit with ball bearings for flush trimming wood edges. The ideal replacement tool for woodworkers. Not suitable for use on glass, metal, concrete, etc. The package contains: 4 router bits. Total lengths: 58.4 mm, 71.1 mm, 85.7 mm, 96.5 mm.