I was glad to find a 4 hook extender because the bras I purchase between here and another store require them. I have been sliding by with a 3 hook (purchased elsewhere) for the last few weeks for comfort but l wanted one that secured all 4 hooks. The spacing between closures in my previously purchased extender was perfect and from my knowledge the standard because it suits every bra I've had. I am pretty disappointed that this extender will most likely cause some damage to my new bras and I hope it doesn't pull the hooks out of the bra itself. Maybe I will be wrong. Time will tell. I am adding a picture for comparison.
Saint John, NB