XtremepowerUS 5pc Small Size Diamond Dust Hole Saw Set 5/32" ~ 1/2" for Glass Saws Marble Includes 5/32 inches , 1/4 inch, 5/16 inches, 3/8 inches and 1/2 inch sizes Shank: 1/4" Excellent results in glass, marble, slate and tile The Diamond Coating on These Saws Give Superior Performance & Life