Also called corner or angle clamps, miter clamps are specifically designed to press mitered or butted corners together and keep them aligned during gluing and/or fastening. The MLCS Can-Do and Pony Rapid Acting Miter Clamp are like small vises that form 90° corners, even with members of different thicknesses. To quickly clamp all four corners of a picture frame, chair frame, shadowbox, etc. at once, choose a frame clamp, such as the Veritas 4-Way Speed Clamp or Woodpecker’s production-oriented Square, Wedge and Toggle Clamping Set.
For clamping non-square corners, Bessey’s MCX miter angle clamps attach to frame or carcass members, then regular bar clamps are used to clamp corners at a variety of angles. Bessey’s Irregular Clamp Set allows even more versatile angle clamping jobs, such as fastening a down-angled stair railing to a newel post.