This thing is a door handle and latch for 3mm Acrylic doors to flush fit the 2/2X style printers with the metal frame and routed plastic (foamed PVC) panels. This latch attaches to a whole in a lasercut 3mm Acrylic panel (ex: http://www.thingiverse.com/thing:991861). And latches the doors securely closed on the 5mm plastic panels. This requires on 16mm M3 Flathead machine screw and a M3 nut to assemble. It should be used with the Hinges (http://www.thingiverse.com/thing:994118) and the stress relieving washers (http://www.thingiverse.com/thing:755320) This latch, the hinges, door panels and acrylic hood, are available as a complete kit for the these style printers. Kit can be ordered at: http://drazzticaction.com/products-page-2/3dprinters/enclosure-for-makerbot-replicator-2-2x-3d-printers-and-similar-clones/ EnjoyPrint out and attach to the Acrylic Door panel with 16mm M3 machine screw and M3 nut.