Able to cut rapidly through porcelain, glass, ceramics, brick and stone, these hole saws are the ideal solution in the toughest of cutting situations Small diameter hole saws are perfect for kitchen and bathroom installations Smooth surface finish, ideal when cutting glass and porcelain Drive Arbor and Drill not required as the Tile Drill is held directly in the Power Tool Chuck Core slot improves ergonomic use through ease of core removal, as well Maximum Cutting Depth of 25mm (1" ).