Abstract: The present invention provides for circle cutters to cut drywall. The circle cutters include a removable pivoting member, a beam and a cutting member. The beam has a groove with teeth in the bottom as well as a slot. The pivoting member includes a surface having teeth for interlocking with the groove teeth. Additionally, one or more contact protrusions can be provided on the bottom surface of the beam for improved circle cutting on textured drywall surfaces.

Abstract: The present invention provides for cutting devices used in conjunction with a flexible measuring tape to cut drywall. The end segment and angled tab of the measuring tape are retained between two body components of a unit having an extended knife blade. Optionally, a guide unit is provided for attachment to the measuring tape in order to guide the cutting device in the preparation of cuts of uniform width and sufficient cutting depth to break the sheet along the cut.