GD1005490090900 T Dia-HSS Parabolic Jobber Drill-130 Degree Point-Nitrided LandsFull Description Drill Bit Size / Cutting Diameter (DC) T Shank Type Straight Decimal Equivalent 0.358" Connection Diameter Machine Side (DCONMS) T Drill Bit Size / Cutting Diameter (DC) - Letter /?Wire Gauge T Shape Parabo