Replacement, as this type of brush replaces the phased out snap on proxibrushes, good but in my opinion not as good as the older brushes, not as convenient and seem to be less stiff then older brushes.
I like the handle for in between teeth cleaning.
These handles hold the brushes very securely. I have one for each of the four brush sizes; I hold them all in one hand, and as I floss I quickly switch between them as needed.
I have used your products for many years but found them hard to find in local stores CVS & Rite-Aid which is why I ordered them on-line.
not enough brushes in each package.