These blades are used for concrete and other materials as well, used at almost every construction site. This is the best quality blade out in the market, %90 of USA building projects use this company, while this product is the best quality and best performance over all other brands. Recently we participated in a blade test for the Nuevo Dorado, the expansion of the International Airport of Bogota the test was done on several brands for performance, product life, etc. The A/C-4Pro of 14? had a performance of 2,800 meters at 10 centimeters or 4?; Equivalent to a lineal cut of 11,200 metros a 1?.