Rockler’s 45 Degree Miter Sled is the jig needed by anyone wanting to do any sort of framing, including picture framing. With the jig moulded at 90°, cutting one piece on the leading face, and the second from the trailing face, you are always guaranteed a 90° joint. Nylon pins are provided to set the sled to individual table slots to prevent any sideways movement.
Self-adhesive sandpaper faces can be added for that little extra grip, or clamps can be used, with holes through to the table allowing for extra clamping.
Perfect mitres each time.