The SpinLight 360 EXTREME Modular System is a wonderful light control system for speed lights. With just a twist of the SpinLight Ring one can quickly and easily control the direction of light emanating from a speed light. The innovative Ring System allows for bounce cards and domes to be attached to the ring and with just one hand, the whole ring can be turned up to 360º to direct light to or away from your subject. No more harsh lighting or heavy side shadows! Included in the EXTREME Modular System are 2 black and 2 white bounce cards for varied uses and with the included domes, half-dome and gels, the light strength and quality can be adjusted to your needs. Using the included Velcro strap, the SpinLight Ring secures easily to almost any standard size shoe-mount flash. And with the SpinLight Ring in place, any one or a combination of light modifiers and gels can be attached to control light as your shooting situation demands. Two circular gels are included, but any gel can be customized to work with this unique gel system. The SpinLight Ring System is compatible with Nikon SB-600, Nikon SB-700, Nikon SB-800, Nikon SB-900, Nikon SB-910, Canon 580EX II, Canon 580EX, Canon Speedlite 600EX-RT, Canon 480EX II, Sony HVL-F58AM flashes, and all flashes of similar size.