Asc Product Number Disc Blade Style Diameter Thickness Center Hole Concavity Country Of Origin #80327 Notched 16 In 3 Mm 1 Square 1-1/2 In India Specifications : N1611-1s 16 In. X 3mm, 1 In. Sch, 1-1/2 In. Concavity, Notched.