SE DH6HS Diamond Hole Saw Set with 80 Grit and 1/4" Shank Size (6 PC.) 6 Hole saw sizes: 5/32", 3/16", 1/4", 5/16", 3/8", 1/2" Shank size: 1/4" Grit: 80 Nickel plated Diamond-coated tips