"Having bought some Erbauer items in the past I was a little sceptical about these diamond discs as the quality of Erbauer stuff is not always up to it. However they were excellent with very little chipping on some quite delicate blue ceramic wall tiles. I did notice after about 250 cuts the performance drop away slightly but nothing dreadful. I have an old plasplugs tile saw and it is not always easy to find the 80mm diameter discs for it. So I grabbed these on a deal where they worked out at about £6.00 each if you bought three or more. Although that deal appears to have ended I would still pay the £9 full price and can recommend these to any DIYer or professional alike."