Frame Clamp DIY Woodworking Joint Jig

This is a fixing jig for accurately creating frame borders such as picture frames, window frames, and doors, released by Yoita Riki Kogyo in Sanjo, Niigata Prefecture. I purchased it at a DIY event some time ago, but it has been stored unused as my skills haven't advanced. The company that sold it no longer handles this product. Since it is unused, its usability is unknown, but there are no missing parts. It has been stored indoors, but there are some signs of age, such as on the case. Please purchase with an understanding of this.