Tools & Making

Andrew Demko

Tri-Ad Lock folding-knife mechanism

United StatesEvidence: high confidenceChecked July 2026

Third-party image used for identification in nonprofit educational commentary; rights remain with Demko Knives.

Who is Andrew Demko?

Andrew Demko is an inventor associated with United States. Their documented work in tools & making includes Tri-Ad Lock folding-knife mechanism, the contribution at the center of this evidence-backed profile.

Andrew Demko invented the Tri-Ad Lock, a folding-knife mechanism that transfers cutting and spine-load forces through a dedicated stop pin into the handle. Cold Steel identifies Demko as its originator and explains the load-distribution engineering.

Known forTri-Ad Lock folding-knife mechanism
FieldTools & Making
Associated withUnited States
Evidence reviewed2 sources
01

What did Andrew Demko invent?

invented the Tri-Ad Lock, a folding-knife lock that uses a stop pin to redistribute load into the handle

02

What did Andrew Demko accomplish?

The Tri-Ad Lock made unusually high lock strength a recognizable feature of modern hard-use folding knives.

03

What is known about Andrew Demko today?

Demko Knives published a June 19, 2024 report of Andrew Demko’s in-person interview at Blade Show 2024.

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