Spyder Tungsten Carbide Tipped (TCT) hole saws make 10x more cuts and are 5x faster than standard bi-metal hole saws
Tungsten carbide tipped (TCT) pilot bit is for use on wood, cement block, brick and other masonry materials
Use Spyder TCT hole saws for extended life, clean cuts and extreme material drilling versatility
Universal 5/8-18 thread