You can connect two shelves of DAISO joint rack with M5 screws. ダイソーのジョイントラックの転び止め棚２つをM5のネジで連結します。 Change parameters of <> in FreeCAD as you like. FreeCADの<>の長さを適宜変更してください。 Use it with https://www.youmagine.com/designs/daiso-join-rack-shelf-connector-parametric-version . SHA-256 checksums: 8bbb51efd5e1eaed319cb0cfe51895077bc1fdacde78e8fbc3a3bd265b68e2bb s2s.FCStd 3ea9637a6b6656eb9f1dba0b39c9fadc23a3e5317f9f67fc02374453a33f7858 s2s.stl 383d2afd061df8c1f9f8d4e672e6517837886fef723f83b1b2ddddcef54150b7 key.stl s2s.FCStd is FreeCAD source code