Knife Lock Types Explained: Liner Lock vs Frame Lock vs Button Lock vs Lock Back

Understanding Folding Knife Lock Mechanisms

A folding knife is only as safe as its lock. Understanding the differences between lock types is essential knowledge for any knife enthusiast. This guide explains the four most common folding knife locks.

Liner Lock

A spring-loaded metal liner slides behind the blade tang when the knife opens. To close, push the liner aside and fold the blade shut.

• Pros: Simple, reliable, easy one-handed operation, lightweight, affordable.
• Cons: Can wear over years of use. Not as inherently strong as a frame lock.
• Best for: Everyday users. Artisan Cutlery uses liner locks on Orthodox and Ahab models.

Frame Lock

The lock bar is part of the handle frame itself (usually titanium), flexing inward to engage the blade tang.

• Pros: Very strong, premium feel, natural spring memory in titanium.
• Cons: Heavier, more expensive, can have "lock stick" if not properly finished.
• Best for: Users wanting maximum strength. Artisan Cutlery's Santee and Tortoise feature titanium frame locks.

Button Lock

A spring-loaded button on the handle spine locks the blade. Press to release and close.

• Pros: Ambidextrous, fun fidget factor, smooth action, clean aesthetic.
• Cons: More complex, harder to clean if grit gets inside.
• Best for: Fidget lovers. Andromeda 1856P is an excellent button lock option.

Lock Back (Spine Lock)

A notched bar on the spine engages a notch in the blade tang. Usually two hands to close.

• Pros: Extremely strong, simple mechanism, proven design.
• Cons: Usually needs two hands to close, not as convenient.
• Best for: Traditionalists and hard-use scenarios.

Comparison

Factor	Liner	Frame	Button	Lock Back
Strength	Good	Excellent	Very Good	Excellent
1-Handed Close	Yes	Yes	Yes	No
Ambidextrous	No	No	Yes	Yes
Price Range	$20-200	$50-500+	$40-300	$20-150

Which Lock Should You Choose?

For most EDC users, liner or frame lock is best. Liner locks offer the best balance of affordability and reliability. Frame locks add strength and premium feel. Button locks excel for ambidextrous operation. Lock backs suit traditionalists.

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Explore our folding knives with various lock types.