The conical needle is composed of three leaf-shaped sections. Its tip is a conical triangular point perpendicular to the needle’s longitudinal axis, and at any cross-section along the working part it retains a triangular profile. From the tip toward the shank, the needle gradually thickens, and the taper angle increases distinctly. The barbs along each edge are graded in size: the closer to the tip, the smaller the barb. Multiple barbs are arranged in a helical (spiral) pattern along the three edges, with their tips oriented toward the needle point. Under design criteria that preserve penetration ability, conical felting needles reduce breakage risk, lower heat generation, and minimize damage to fibers.