The Dremel 561 is a multi-purpose high-speed cutting drill bit with a 1/8 in. spiral fluted shape steel shank. Ideal for free-hand cutting in softer materials cutting wood plastic fiberglass drywall laminate aluminum and vinyl siding. This bit can be used in a variety of applications such as preparing an area for light fixtures or making cutouts in cabinets and paneling. Use with the 565 Multi-Purpose Cutting attachment is recommended; the attachment is designed to help maintain depth during the application.