You will use these grids all the time. They're so easy for hair lighting and background lighting.
This honeycomb will fit to ANY standard reflector designed to be used with honeycombs, provided that the reflector has a diameter of 7". It can be used with Elinchrom, Profoto, Alien Bees, Bowens, Hensel, Balcar and other reflectors with a 7" external diameter.
This Strobepro grid set is a fantastic bargain and the grids are solidly built. Years ago, I paid $180 for a big brand 7-inch grid set. The differences are that the expensive grids have a better designed way of staying in place (the Strobepeo grids have a single spring but the expensive grids have three) and the expensive grids are white which affects the how the light falls off. But then again, the Strobepro grid set is one-quarter the price. It would be nice if Strobepro sold a white grid set.