Holds firmly without slipping, until released. 48" x 48" with non-marring Lexan corners, steel screws and zinc alloy nuts that adjust quickly to fit any rectangular frame 2" x 2" to 4' x 4'.
Other Items from Picture Frame/Corner Clamps Miter Framing Clamp - Corner Clamp - 4" Framing Vise - each Small Mitre Clamp Kit -