They will work just fine I have well over 2000 of those old mustad hooks and just bought from this board another 400. The reason I like them is I do not find the old ones having as much variance as the new ones do from hook to hook. The new ones from Mustad I often find have a variance in the hook bend which will cause a bead or cone head to slide onto easy one hook from a package of hooks but not the next. With the older hooks when I find a bead of cone head that goes around the bend easy it will do the same for every hook in the package allowing me to not have to sort through the hooks saving me time at the tying bench