This is a seat locker, a jig for securing the seat when folding a folding wheelchair. Are you having trouble with the seat opening during loading or transportation in a car? Normally, the seat will be slightly open when folded as shown in the fourth image, but this jig can be used to secure it. It is easy to attach and detach. It doesn't take as long as securing it with a belt. It also prevents the seat from opening when loading it into a car. Applicable wheelchairs have a seat pipe diameter of 19mm or less and a folded width of 70mm or less. The wheelchair in the photo is an OX Engineering GWXⅢ. Dimensions can be changed. Please consult us in advance. It is made with a 3D printer. Therefore, there may be layer lines and burrs (snags), but we appreciate your understanding. It will be shipped via Nekopos or Yu-Packet Post. Material: ASA