KYOCERA SCMT170610SMIPR1535 DRV Magic Drill 4-Cutting Edge Positive Rake Indexable Drilling Insert, ANSI Code: SCMT170610SMIPR1535, Square Shape, #170610 Insert, SCMT Insert, 0.2591 in THK, 0.7047 in Inscribed Circle, Manufacturer's Grade: PR1535