This GL21 Tungsten-carbide tipped scoring blade set is made by Leitz (China), a German leading specialist in the field of precision tool technology. GL21 is used on 250mm and 300mm sliding table saws which need wonderful cutting finish. It features 120mm diameter, 20mm bore, 24 teeth and Max. 19000 RPM. GL21 provides silky smooth cutting and long life in working.