The Mustad R73-9671 Signature Fly Hook provides superior strength, unparalleled sharpness and remarkable consistency. Precisely scaled with an optimally proportioned wire diameter, shank length, gap width and barb. The R73-9671 Fly Hook features chemically sharpened points ensuring instant penetration with every strike, and are forged tough using Mustad's exclusive Nor-tempering process for 30% less bends and breaks than comparable models.