The Hertel Taper Pin Reamer is a precision machining tool designed for creating or finishing tapered holes with exacting specifications. This #4/0 pin reamer features a 0.0869" small end diameter that expands to 0.1142" at the large end, providing the perfect taper for standard #4/0 pins. Crafted from durable high-speed steel, this tool delivers exceptional performance and longevity even with repeated use. The reamer features a 1/8" diameter straight shank for secure mounting, a generous 1-5/16" flute length, and an overall length of 2-5/16". Its left-hand spiral with right-hand cut design and 3 helical flutes ensure smooth operation and superior finish quality. This professional-grade tool is ideal for machinists, toolmakers, and manufacturing professionals who require precise tapered holes for pins, dowels, or alignment applications.