This tool holder hangs on the frame of the 12 cubed printer. It holds 2 large glue sticks, tools, and 6 sd cards. It will rest on any ~.25" (6mm) frame. I will be working on other styles too. Added chamfer to openings to reduce the clean up work. 12/8/2014 Extended the stop tab for the glue sticks and added a smaller version with only 4 sd holder slots..2 layer, 20% infill, support: touching build plate.