LimoStudio Photography Light Stand Holder, Photography Studio Holder, with Umbrella Shoe Mount Clamp, AGG371 Flash Shoe Holder Swivel Bracket Umbrella Mount (x1) Useful flash light mount for your camera Attached to your light stand Insert your flash unit and umbrella 3/8" Tread Tip w/ 3/16" screw , 3/8" Tread Tip w /5/16" screw