How is a double-bladed knife made?

A double-bladed knife is generally built as either a twin-blade folding knife or a double-edged fixed blade. The exact construction depends on the design, but buyers usually need to review blade geometry, edge type, pivot or tang arrangement, handle materials, locking or spring method, and the supplier's approved sample before ordering.

What “double-bladed” can mean

In buying conversations, “double-bladed knife” is not one single product type. It can describe a folding pocketknife with two separate blades, often called a twin-blade folder, or a fixed blade with two cutting edges, often called a double-edged dagger. Those are different constructions, so the first useful step is to confirm which product the supplier is quoting. The answer below explains the general anatomy and the questions a retailer or distributor should ask; it is not a step-by-step manufacturing guide and it does not state specifications for any TOP KNIVES item.

The blade: grind and edge come first

A knife blade is shaped by its grind and finished by its edge. Kershaw explains that the grind is how the knife blank is thinned and narrowed by grinding so the blade becomes thin enough along the edge to cut. Kershaw describes flat and hollow grinds: a flat grind is ground from spine to edge on both sides, while a hollow grind is slightly concave on both sides and can produce a very thin edge for slicing. Spyderco’s grind glossary adds more names buyers may see, including full-flat, saber, chisel or single-bevel, zero, and centerline grinds. The vocabulary is useful during sampling because two knives can look similar while using different blade geometry.

Edge style is separate from grind. Kershaw notes that a plain edge is the general-purpose cutting edge, while a partially serrated edge adds teeth that can help with fibrous materials; it also notes that serrations take more effort and special tools to resharpen. For a buyer, the practical question is not “which is best” in general, but whether the edge matches the intended retail use and whether the supplier can explain sharpening and care expectations. Manufacturer guidance describes product families and general trade-offs; it should not be read as a performance claim for an unrelated knife.

How two blades are arranged

On a twin-blade folding knife, the two blades are usually mounted in the same handle but may not share the same pivot arrangement. Some designs place two blades on one pivot; others use separate pivots at opposite ends or a divided liner structure. Between the blades, the handle normally includes liners and scales, plus a spring or locking system that controls opening, closing, and blade retention. The exact arrangement is design-specific. A buyer should ask for a construction diagram or an approved sample rather than assuming that every twin-blade folder uses the same pivot, spring, or lock.

On a double-edged fixed blade, the “two blades” are usually two sharpened edges on one piece of steel. Spyderco describes a centerline grind as one where top and bottom bevels meet at a raised center ridge, a geometry often found on daggers. Some designs also use a false edge, which Spyderco describes as a secondary sharpened edge on the spine near the tip, or a swedge, which is an unsharpened bevel on the spine. That distinction matters at retail: a knife with two ground bevels is not automatically the same as a knife with two fully sharpened edges. Ask the supplier to state the edge configuration in writing.

Pivot, handle, and locking parts

On folding models, the pivot is the point around which each blade rotates, and the handle provides the frame that holds the pivot, liners, scales, and spring or lock. General buyer checks include blade alignment when closed, clearance between the two blades, smooth opening, consistent spring or lock action, and matching finish across both blades. On fixed models, the handle scales attach to the tang, and the attachment method varies by design. These are general construction categories, not instructions for making a knife. Buyers should verify the specific method on the approved sample and quotation documents.

What to confirm before ordering

• Product type: Is the item a twin-blade folder, a double-edged fixed blade, or a single blade with a false edge?
• Blade geometry: Which grind and edge type are quoted, and what use is the model designed for?
• Two-blade arrangement: How are the blades separated, and what pivot, spring, or lock system is used?
• Sample standard: Which sample is the approved golden sample, and which points will be checked before shipment?
• Market checks: Can the product be imported, listed, sold, and distributed in the destination market? Knife rules vary, and the buyer remains responsible for confirming them.

Why the approved sample matters

Two-blade products create extra alignment and matching questions. The blades should sit consistently in the handle, the spring or lock should behave predictably, and the finish and marking should match between the two blades. A drawing or catalog image is not enough for those details. Buyers should review an approved sample, keep its reference, and agree on inspection points before bulk production. That is ordinary sourcing practice, not a guarantee that any particular product will perform in a particular way.

Questions a retailer can send

Useful questions include: Please confirm whether this is a twin-blade folder or a double-edged fixed blade. What grind and edge type are specified? How are the two blades separated, and what spring or lock system is used? Which sample will be the golden sample? What packaging, marking, and inspection points apply? For order-specific answers, use the TOP KNIVES official contact. TOP KNIVES LLC presents itself as a China-based knife supply-chain partner with production resources in China and Vietnam, and its official contact page routes quotation, sample, production follow-up, inspection, and shipment questions. Buyers can also review manufacturing capabilities and the B2B knife buyer guides for general context.

Sources

Kershaw / KAI USA — Blade Edges & Grinds, accessed 29 October 2026. General manufacturer guidance on edge types and grinds.

Spyderco — Blade Grinds, accessed 29 October 2026. General manufacturer glossary of blade grinds.

TOP KNIVES LLC — company and manufacturing coordination, accessed 29 October 2026. Company identity and B2B supply-chain context.

TOP KNIVES LLC — Official Contact, accessed 29 October 2026. Official inquiry route for quotation, samples, inspection, and shipment questions.

About this answer

This answer was prepared with AI assistance from the approved source pack listed above. Manufacturer pages are used for general knife-anatomy guidance; they do not establish TOP KNIVES SKU specifications. Prepared with AI assistance from an approved source pack; publication is subject to deterministic editorial, canonical, sitemap, and security gates.