Mercer Culinary Millennia Curved Boning Knife 6 in (M23820)
By Mercer Culinary · Kitchen Knives · Kitchen & Cooking · More from Mercer Culinary
- One-piece high-carbon Japanese steel, stamped, HRC 53-54
- Curved 6 in (15.2 cm) blade, blade angle 15°
- Santoprene and polypropylene handle, NSF certified
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Summary
A stiff 6-inch curved boning knife for home butchery and second-knife kitchen use, with a textured Santoprene handle and NSF certification. Plan on frequent honing, as owners describe fast edge loss on its soft steel.
Strengths
- Curved 6-inch blade reaches around joints and bones in tight cuts.
- Textured Santoprene handle stays grippy with wet hands.
- Finger guard adds protection during trimming and portioning.
- Light build reduces fatigue during longer prep sessions.
- Soft steel responds quickly to a honing steel or stones.
- Color-coded handle variants allow separation for different prep tasks.
Weaknesses
- Edge loses sharpness quickly in regular meat prep.
- Owners describe the steel as soft and gummy on sharpening stones.
- Spine finish is reported as rougher than higher-priced alternatives.
- Plastic handle feels less durable than forged knives in testing.
- Hand-wash only, with pitting risk from chlorine and bleach.
- No sheath is included, so safe storage needs a block or separate guard.
Verified specifications
| Model | M23820, black handle. |
|---|---|
| Blade length | 6 in (15.2 cm). |
| Construction | one-piece stamped high-carbon Japanese steel. |
| Hardness | HRC 53-54. |
| Edge angle | 15 degrees. |
| Blade profile | stiff curved boning blade. |
| Handle | Santoprene and polypropylene with textured grip and finger guard. |
| Certification | NSF certified. |
| Origin | made in Taiwan. |
| Total length | 12.25 in. |
| Weight | about 0.5 lb. |
| Packaging | supplied in Mercer Pak. |
| Guard | guard M33117P is recommended and sold separately. |
| Care | hand wash with warm water and mild soap, then rinse and dry thoroughly. |
| Care | do not wash in a dishwasher. |
| Care | avoid chlorine and bleach contact, which discolor and pit the steel. |
| Care | avoid prolonged contact with aluminum pans and stainless-sink soaking. |
| Storage | store in a cutlery block or sheath. |
| Warranty | limited lifetime warranty, 25 years for corporate users. |
Full research notes and sources
Sources
Manufacturer:
- Mercer Culinary — Millennia Curved Boning Knife 6 in product page
- Mercer Culinary — Millennia Colors Curved Boning Knife 6 in Yellow product page
Independent reviews:
- Reviewed — Best boning knives and fillet knives
- Serious Eats — Best boning knives
- Serious Eats — Mercer Millennia budget-friendly chef’s knife
- Thirsty Bear — Best boning knives
- Wirecutter — Mercer Millennia bread knife review
- Kaz Sushi Bistro — Best boning knives
Owner reports:
- Reddit r/chefknives — Thoughts on Mercer Culinary Millennia chef knives
- Reddit r/chefknives — Mercer knives hold an edge discussion
Stores:
- WebstaurantStore — Mercer Culinary Millennia Colors 6 in Curved Stiff Boning Knife with Brown Handle
- WebstaurantStore — Mercer Culinary Millennia Colors 6 in Curved Stiff Boning Knife with Green Handle
- Wasserstrom — Mercer Culinary M23820 Millennia 6 in Black Curved Boning Knife
- Chefs’ Toys — Mercer M23820 Millennia Curved Boning Knife 6 in
- Katom — Mercer Culinary M23820 6 in Boning Knife
