This is a quick release plate for a Manfrotto-Bogen #3026 ball-head tripod. To buy one of these things is at least $20 from Amazon stores and probably more, if you can even find one, in a camera store.The full article and photos about the part can be found on an article I wrote on http://www.Inhale3D.com : http://www.inhale3d.com/2012/11/3d-print-a-quick-release-for-monfrotto-bogen-tripod-head/Part was created in ViaCAD. The .vc3 source file is included for download if you want to modify it for purposes of adapting to additional quick release heads in this family.I printed this on a LulzBot AO-100 using 3mm filament and 0.5mm nozzle. Slic3r was used to generate the gcode for MacPronterface for print control.Landon Cox Inhale3D.com