General description High Hardness Engraving Bit Set includes 20 pieces: 10 carbide engraving bits and 10 router bits, designed for DIY woodworking and precision tasks. These bits are suitable for engraving, carving, drilling, grooving, and hollowing, making them ideal for various projects such as crafts, model making, furniture repair, and more. Technical specifications Material: High-speed steel (HSS) with titanium coating Shank size: 1/8" (3mm) Includes 20 different cutter shapes: straight, flush, V-groove, bead, concave, and groove cutters Compatibility and accessories Compatible with most rotary tools and grinders Packaged in a durable plastic box for easy storage and transport Usage Ideal for a wide range of materials, including wood, ABS, acrylic, PVC, and plastic Suitable for tasks such as chamfering, edge grooving, carving, routing, and engraving