The construction of the holster would determine how strong they are. If you mean are they secure? That would depend on the user, I use both crossdraw and strongside holsters as I carry two guns. Just learn to turn your body away from the threat, this will also give a better draw IMO. I call this the crossdraw dance. Step back with the strong foot putting the gun at a angle that is difficult for a threat to grab, but making the draw more efficient.