This is a specially designed PCB that works with the silicon button pads, bezel, and mounts easily into a project enclosure! The PCB accepts 3mm LEDs and 0.1 inch headers for connections. The PCB can be separated into 3 different button configurations or used as is. Each button configuration has 4 mounting holes located in each corner for sturdy mounting in any enclosure. The center button is directional, so an up, down, left, or right push will toggle the breakout pins, see schematic for more details. This is only the bare PCB. Please see the related parts below for hardware and compatible components. Project description, more information and ordering can be found at https://www.sparkfun.com/products/8963 Enclosure mounting instructions: http://www.sparkfun.com/datasheets/BreakoutBoards/sm_button_pad_installation.pdf