KYOCERA SCMT110406GMECA520D DRV Magic Drill 4-Cutting Edge Outboard Positive Rake Indexable Drilling Insert, ANSI Code: SCMT110406GMECA520D, Square Shape, #110406 Insert, SCMT Insert, 0.1772 in THK, 0.4331 in Inscribed Circle, Manufacturer's Grade: CA520D