S
simhopper
No one can really say how long they will last as we dont know what you are drilling into. I can certainly say that as long as you use a wet sponge to cool and clean the drill bits as shown in the videos on the website for 365 drills they will last a lot longer that you will expect.
I have been using 365 Drills for quite a while now and have no reason to change.
Just because they are a site sponsor it doesnt mean i will "big" them up, I say they are good because they are !
I have not used 365 but i have used diamond grit with poor results
The armeg sets i have are a few years old and have done at least 100 holes per core and show no wear, Mostly porcelain jobs we do
Today i used a armeg PTC 7mm bit on Fired Earth porcelain.....4 holes under correct conditions then the tip snapped......PTC carbides are junk, Diamond cores are fantastic
Ordered a Armeg diamond core on 7mm today so will post up how long it lasts,Cost from CTD £43 per drill