This is the original Rebel Square board featuring All Luxeon Rebel LED Colors. Where else can you purchase a full set of colors that are mounted and ready to use? This is a great test kit. Each LED is the top performer in it's class. We provide you with all the self tapping stainless steel screw and spring loaded washer that you need. These screws are suitable for aluminum or copper heat sinks. You will need a 2.7mm drill bit to tap the mounting hole. The screw will self-thread. Drill bits can be purchased from our site. The Rebel Square board is a great product for mounting LEDs. Bare boards, Drill, and Screw packs can also be purchased here on-line.