1、MULTIPLE USAGES: These bits have deep round nose, which are suitable for making small bowls, coin trays, jewel boxes, fishing gear boxes, etc. 2、APPLICABLE WOOD: These cove box bits are suitable for processing all types of wood, such as MDF, hardwood, cork and particle board. 3、8MM SHANK: These woodworking carving bits have standard 8mm shank, and can be stably installed on CNC router, handheld or desktop router. 4、TUNGSTEN STEEL ALLOY: These cove box router bits are made of tungsten steel alloy, with high hardness, impact resistance, and wear resistance. 5、4PCS IN 1 SET: Including 4pcs round nose core box bits, with different specifications to meet more woodworking or DIY processing needs.