Multi-Function: 20 different router bits of the most commonly used types to meet different woodworking situations, each router bit is shaped to suit different angles or situations. Suitable for carving, engraving, drilling, chamfering, grooving, reaming, shaping, hollowing. High quality: rotary cutter set made of high speed steel (HSS) and titanium coating for long life, good wear resistance, durable, faster cutting and high working efficiency. Save time and money. High CompatibilityWith 3mm shank, length: 39mm, common sizes compatible with most engraving tools, rotary tools or grinders, such as Dremel , Apollo, Chicago and more. Widely Used: Used in processing different types of materials, including wood, plastic, ABS, PVC, acrylic or resin. Suitable for detailed work, such as house repair, crafts, building and sanding dollhouse furniture, model trains, buildings and airplanes. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.