Precision Twist Drill Core Drill, Long Length, Series: T400, 1-3/8 in Drill Size - Fraction, 1.375 in Drill Size - Decimal Inch, 14-1/2 in Overall Length, 8-7/8 in Cutting Depth, 4 Flutes, Spiral Flute, 8-7/8 in Flute Length, 1-3/8 in Shank, #4 Morse Taper Shank, 118 deg Point, Chamfer Point, Right Hand Cutting, HSS Cutting Edge, HSS, Steam Oxide, Applicable Materials: Magnetic Soft Steel, Structural Steel/Case Carburizing Steel, Plain Carbon Steel, Alloy Steel, Lamellar Graphite, Alloy Steel/Hardened and Tempered Steel, Free Machining Stainless Steel, Austenitic, Ferritic + Austenitic and Martensitic