Tiemco 3761 Nymph Hooks: Sproat bend, Down eye, 2X Heavy, 1X Long, Forged, Bronze. Nymphs & Wet Flies.They are balanced, for excellent heft and strength-to-weight ratios, and chemically sharpened, for extra razor sharp edges. Tempered from Japanese steel ; Tiemco has been the world's most respected designer and manufacturer of hooks designed exclusively for fly fishing.