Folding Knife

A folding knife has a blade that pivots into the handle for compact storage and carry. Many folding knives are designed as pocket knives, although the terms are not strictly interchangeable.

Three mechanisms decide how a folder feels in use: how it opens, how it locks, and how it carries. A traditional slip joint opens with a fingernail and holds shut with spring tension; a modern liner lock opens with one thumb and locks rigid until you release it. Choosing between them matters more than blade shape or steel.

Shop Folding Knives

Explore our folding knives and pocket knives in traditional and modern designs. Compare locking mechanisms, opening styles, blade profiles, handle materials, and overall size to find a folder suited to everyday carry, light utility work, collecting, or gifting.

When comparing folding knives, consider:

• Locking mechanism: Compare slip joints, back locks, liner locks, frame locks, and other locking systems.
• Opening method: Look for nail nicks, thumb studs, thumb holes, flippers, or other opening designs.
• Blade size: Consider blade length, closed length, and overall weight based on how and where you plan to carry the knife.
• Blade steel: Compare corrosion resistance, edge maintenance, sharpening characteristics, and the care required for the specific steel.
• Handle and carry: Check handle material, grip shape, pocket-clip position, and overall balance.

Browse the collection below to compare folding knives by lock type, opening mechanism, blade design, steel, and handle construction.

What Is a Folding Knife?

A folding knife is a knife with a blade attached to the handle by a pivot, allowing it to swing closed into a channel between the handle scales. Folding pocket knives trade some strength for portability: the pivot and lock are the weak points that a fixed blade doesn't have.

That trade is the right one for everyday carry. A folder with a 3-inch blade handles cord, packaging, food, and small repairs, weighs a few ounces, and disappears into a pocket in a way no fixed blade can.

Types of Folding Knives

The most useful way to sort types of folding knives is by lock, then by how they open.

By Lock

Slip joint: No lock at all. A backspring holds the blade open or closed with tension, and firm pressure on the spine will close it. Legal in more places than locking knives, but not suited to hard use.

Back lock: A rocker bar along the spine drops into a notch on the blade when open. You release it by pressing the exposed section on the back of the handle. Strong, traditional, and usually a two-hand close.

Liner lock: One of the steel liners inside the handle springs across behind the blade when it opens. You push it aside with your thumb to close. Allows one-handed opening and closing.

Frame lock: The same principle as a liner lock, but a section of the handle frame itself becomes the lock bar, making it thicker and generally stronger.

Other mechanisms, such as crossbar and button locks, work differently but serve the same purpose: holding the blade rigid until you choose to release it.

By Opening

• Nail nick: a groove in the blade you pull open with a fingernail, typical of traditional patterns.
• Thumb stud or thumb hole: lets you open the blade one-handed by pushing it out with your thumb.
• Flipper: a tab on the back of the blade that you press with your index finger to swing it open.
• Assisted opening: a spring completes the motion once you start it manually.
• Automatic: opens entirely by spring at the press of a button. These are restricted or illegal to carry in many states and countries.

Traditional Pocket Knives

Traditional pocket knives are the patterns most people's grandparents carried: bone or wood handles, brass liners, nail nicks, and usually no lock. They include several classic types of pocket knives:

• Stockman: three blades of different shapes, a workhorse for farm and ranch use
• Trapper: two long blades, originally for skinning and trapping
• Barlow: a single blade with a long bolster, cheap and durable historically
• Peanut: a very small two-blade pattern for light work
• Canoe: two blades in a handle shaped like its name
• Sodbuster: a large single blade in a simple handle, built for farm work

They suit light tasks, traditional knife enthusiasts, gifting, and collecting. Modern locking folders offer different handling characteristics and may be more suitable when one-handed operation or a locking mechanism is specifically required.

Choosing Your Folding Knife

Size

A 2.5–3.5 inch blade handles most everyday tasks. Small pocket knives under 2.5 inches weigh almost nothing and are legal in more places. Anything over 4 inches starts behaving like a fixed blade in weight and legal treatment.

Lock strength

For cutting where the blade might meet resistance, choose a lock. Good pocket knives lock up solidly with no side-to-side or up-and-down movement at the pivot when open.

Steel

Stainless steel handles pocket moisture and sweat with little care. Carbon steel takes a finer edge but needs occasional oiling. Damascus blades are chosen as much for pattern as performance.

Handle and carry

Look at the pocket clip position (tip-up or tip-down, and whether it can be moved for left-handed carry), the handle material, and the closed length. A knife that's awkward to carry gets left at home.

Looks

Cool pocket knives usually earn the description through Damascus patterns, filework on the spine, or natural handles like stag and bone.

The best pocket knives are the ones matched to their job: a locking one-hand opener for daily work, a traditional slip joint for light tasks and gifting. The best folding knives for hard use combine a strong lock with full steel liners. Decide which you need before comparing folding knives for sale on price.

Custom work

Custom pocket knives let you choose blade shape, steel, and handle material. Before ordering custom folding knives, confirm the lock type and lead time with the maker, or contact the workshop.

Folding or Fixed Blade?

A folder wins on portability, legality, and discretion. A fixed blade wins on strength, simplicity, and ease of cleaning, which is why hunters and campers often carry one alongside a pocket knife. For outdoor work, compare hunting knives and bushcraft knives. 

Keeping a Folder Working

Test the lockup regularly

Open the knife and gently press the spine. A locking blade shouldn't move at all; any give means worn lock faces or a loose pivot, and the knife shouldn't be used for hard cutting until it's fixed.

Check for blade play

Hold the handle and try to wiggle the open blade side to side. A little movement can often be corrected by tightening the pivot, if the knife has an adjustable one.

Clean out lint

Pocket carry packs lint into the handle channel, where it traps moisture against the edge. A blast of air or a soft brush clears it.

Use a light lubricant

A small amount at the pivot keeps the action smooth. Too much attracts dirt, so wipe away the excess.