Titan USA Taper Pin Reamer, Series: 988, Taper Pin Size/Number: #4, 0.2604 in Dia Reamer, 0.2071 in Small End Diameter, 4-1/16 in Overall Length, Straight Shank, 17/64 in Shank Diameter, 6 Flutes, Left Helical Flute, 2-9/16 in Flute Length, HSS, Uncoated, Right Hand Cutting Direction, Applicable Materials: Steel/Non-Ferrous Metals