The Mustad 94840 is a Norwegian-manufactured dry fly and nymph hook in size 10, produced circa 1950–1965, with a round Kendal-style bend, tapered turned-down eye, standard wire gauge, and bronzed finish. Its defining feature is forged straight construction paired with a hollow point geometry—a knife-edge profile that concentrates penetrating force on delicate trout mouth tissue while minimizing tippet strain, solving the central problem of light-leader fly fishing. The round bend provides ample gap and neutral water attitude without the pronounced curve of a Sproat, accommodating a broad range of traditional dry fly body profiles. The 94840 became the standard pattern for American stream fly tyers from the Catskill tradition through mid-century because Mustad industrialized a hollow-point design rooted in 19th-century Redditch craft production, making efficient hook-setting force achievable on gossamer leaders.

The Mustad 94833 is a Norwegian-manufactured dry fly hook produced circa 1960–1975, featuring a Viking bend, tapered turned-down eye, extra-fine 3X wire gauge, and bronzed finish. The defining engineering feature is the 0.008″ wire diameter—roughly 30–40% lighter than standard dry fly hooks—paired with a hollow point geometry that permits hook-set on delicate tippets without heavy pressure. This combination of reduced mass and minimal-force penetration established the 94833 as a foundational design for precision dry fly work on selective trout, and the hook remains sought after by collectors and traditionalists despite its relative scarcity in smaller sizes.