This is a handy holder for Sparkfun's blueSMiRF RN-42 based bluetooth modules. It can be used with or without the laser cut top as the tolerances hold the module in place. Enjoy! If you like this project and wan't to learn more about making things with 3D printers, laser engravers and other cool maker-tech, check out my new book "The Makerspace Workbench" from Maker Media! Don't forget to follow me on Twitter!