RUBI 7/8in scoring wheel feature a rulina made of tungsten carbide. The exclusive machining and sharpening of the rulina of RUBI 7/8in scoring wheel allow them to offer an exceptional quality in the scratching, both ceramic tiles porcelain stoneware (type BIa) and glazed stoneware tiles (type BIIa) high hardness. The incision of the scoring wheel of the 7/8in scoring wheel is deep, especially indicated for the hardest materials.