Why Won't My Scissors Hold an Edge? The Steel Truth a Sharpener Sees

Why Won't My Scissors Hold an Edge? The Steel Truth a Sharpener Sees

Written by Matt Grumley — Australian scissorsmith, decades cutting hair, 100,000+ scissors sharpened on the bench in Lake Wendouree, Victoria. Active in international professional scissor-sharpening communities.

The most common complaint I hear, at my own bench and across the international sharpening communities I'm part of, is: "I just got these sharpened and they're already blunt." Nine times out of ten it's not the sharpening. It's the steel.

Sharpening restores an edge. It cannot fix bad steel.

I grind a fresh convex edge on Japanese water stones and reset tension. On a quality scissor — forged, named-grade steel at 58–62 HRC — that edge holds 6-12 months of full-time cutting. On cheap generic stainless, I can put a beautiful edge on it and it folds within a fortnight. The steel is too soft to hold the set. No sharpener on earth can fix that, because the problem is the metal, not the edge.

What "holding the set" means

"The set" is the relationship between the two blades and the pivot tension. A good scissor holds it cut after cut for months. A cheap scissor loses it fast — blades separate or grab, hair folds instead of cutting, and you over-tighten the screw to compensate (wearing it out faster). This is the most-discussed failure in sharpening circles worldwide, and it always traces to soft steel and poor heat treatment.

What the international sharpening community reports

I won't print a blacklist — brands change and that's not my place. But the consistent report across professional sharpening groups worldwide is that the mass-marketed "value" brands — the ones sold on big marketing budgets and Japanese-sounding names — come back bluntest, fastest. Sharpeners dislike working on them not from snobbery but because the customer is disappointed no matter how good the sharpening is. The steel won't reward the work. If you've had a scissor that "just won't stay sharp", ask any sharpener — they'll know the type immediately.

How to know BEFORE you buy

• Named steel grade + HRC. 58–62 HRC named alloys (ATS-314, VG-10, Japanese Cobalt) hold the set. Unnamed "Japanese steel" usually doesn't.
• Forged, not stamped. Forging aligns the grain so steel holds hardness.
• Hand-finished and tensioned to the specific blade pair.
• Lifetime Manufacturing Warranty included — a confidence signal a maker only gives if the steel keeps coming back well.

Why ShearGenius scissors hold their set

ShearGenius scissors are forged by specialist partner factories in Japan. Steel grade and hardness vary by model — refer to each product's published specifications — Hitachi ATS-314 (58–62 HRC; forged to 60–62 in the flagship Prodigy) in The Ultimate Range, Japanese Cobalt Alloy (58 HRC) across the other ranges — and hand-finished and tensioned by me before it ships. I know the steel holds because I sharpen them myself at the bench, and I see them come back in good shape year after year. The hardest steel in the range is the forged ATS-314 Prodigy; the Apex runs ATS-314 at 58–60 HRC for all-day work — both covered by the Lifetime Manufacturing Warranty against manufacturing defects.

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