This is the original Rebel Square board featuring 3 Luxeon Rebel LEDs. This particular arrangment of White LEDs is an excellent opportunity to sample all lines of the Luxeon White. Each LED is at the top of their class for brightness. We provide you with one self tapping stainless steel screw and spring loaded washer. This screw is 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.