Core box bits, also known as roundnose router bits, feature a half-round cutting profile that produces smooth, clean half-round grooves in wood and other materials. They are a popular choice for decorative woodworking, carving out channels on cutting boards, crafting fluted moldings, and adding refined detail to custom furniture. These solid carbide bits range in size from 1/8" to 3/8" and deliver consistent, smooth results across hardwood, softwood, MDF, and plywood.