The Lenox Tools 2994848CG Master-Grit Carbide Grit Hole Saw 3-Inch 76MM is best for cutting Abrasive Materials. The Master-Grit hole saws will work great for materials like brick and tile and will work in materials like Cast Iron and Cement Board. The cutting edge is made out of Tungsten Carbide for extreme durability in harsh materials. The carbide grit also reduces snagging and chipping when cutting through thin materials.