Bihui Core Bit Set of 10 with Mills and a Blade

The BIHUI diamond core bit set includes 6 core bits of 25, 35, 40, 45, 50 and 68 mm + a tapered finger bit 20-48 mm and a straight finger bit 20 mm + a blade. The core bits carry a diamond layer made by the newest method: the diamonds are bonded to the bit by vacuum brazing. That method lets you drill holes very fast and without effort even in hard porcelain stoneware. Drill at medium speed on the angle grinder. Before drilling, put a wet pad inside the bit, cut to size for the bit beforehand. Start the hole and drill it while constantly rocking the bit from side to side. Do not lean hard on the face of the tile. On no account cool it down suddenly. Do not run a series of holes one after another – let the bit rest. The gem of the set is a good case to keep the bits in. A mid-size bit should do 40 – 50 holes on average in 10 mm porcelain stoneware. There is no warranty