A lexicon of knife terminiology

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A lexicon of knife terminology: Section F
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False Edge:  On single edged knives, if the spine of the knife has a sharpened portion or a portion that appear to be sharpened it is referred to as a false edge.  Compare to swedge and double edged. 

Farrier’s Knife:  Similar to the Doctors knife the Farrier was a knife designed for the care of horses. The knife normally had a primary spear blade, a spay blade, and a hoof hook.  Additional blades may include a file, a fleam, and a saw.  (Today a Farrier is a person who specializes in the care of horse hoofs. In the 18th and 19th century a Farrier was considered a horse doctor and by circumstance was employed to treat all domesticated livestock, as well as the occasional person.)

Farmer’s Jack: A half whittler design using a sleeveboard handle. The main blade is a half-hawkbill and a secondary spay blade..  Compare to Seahorse Whittler, Jack, Congress Whittler, Half-Whittler and Wharncliffe  ½ Whittler knives.

Ferritic Stainless Steel:  Ferritic stainless steels have approximately of 17% chromium. Ferritic steel is less ductile than austenitic steel and is not hardenable by heat treatment. It makes lousy knife blade but is a type of surgical stainless steel.

Fiberglas Reinforced Nylon:  A strong lightweight man-made material used in knife handles. It can refer to a variety of brand name materials

Fighting Knife:  See Military Style Knife

File:  A blade used for filing fingernails and such.  It will sometimes have a cuticle cleaning tip or otherwise have a spear point.

File Steel: A tool steel used in the manufacturing of files.  It is also known as the ASTM standard W1 Steel.   When .2% vanadium is added it is known as W2 steel. This is a type of steel sometimes used when making Damascus steel.

File Work : Cuts or groove cut in the spine of knife blade, back springs, or other parts of a knife for decorative purposes. Originally the work was done by hand using small triangular or round files. Today it is also done using factory robots for mass production.

Filet or Fillet:  A knife with a blade designed for filleting fish. Typically these knives have no hand guard between grip and blade and have a flexible, long, slender, tapered, blade that comes to very sharp point.

fillet knife
Rapala Fillet knife with 4 inch blade

Finger Groove: See: Pull.

Fish Knife: A type of knife used by fishermen. In the case of pocket knives, the knife usually has a toothpick style handle and fillet blade. A secondary blade is often a scaling blade. The scaling blade is sometimes a combination bottle opener/scaler/hook remover. These are typical large frame toothpicks, 4-6 inches in length with the blades closed.

An Imperial Brand Fish Knife

Fixed Blade: A fixed blade is any knife that has a blade that does not fold and is permanently attached to the handle.

Flat Ground:  When forming the knife’s cutting edge the blades sides are ground to for a “V” shape from the spine to cutting edge.  This done against a smooth service so that the sides are flat.  Also called a “V” grind.

Flick Knife: The British term for a switchblade.

Folder:  A pocket knife.  Any knife that is designed to have its blades folded inside its handle or grip

Folding Hunter: A traditional pattern folding knife; Folding Hunters are normally a large frame folding knives with one or two blades; which open at the top of the knife.  The blades are frequently locking blades. The folding hunter normally has bolsters at both ends and handles that become wider from top to bottom. If the knife has one blade, that blade is normally a large clip blade.  The second blade is normally a skinner.   The length of folding hunters is normally 4 inches or longer with the blades closed.

Fossilized Mammoth Ivory:  A popular knife handle material that comes from Fossilized Mammoth bone or tusks.  It is considered an exotic and beautiful handle material. 

Framelock – Similar to linerlock, the knife’s frame functions as an actual spring and locks the blade in an open position. This is considered more secure than a liner lock. See lockback and linerlock for comparison.

FRN:  see: Fiberglas Reinforced Nylon

Frog:  A cloth or leather strap used to attach a knife’s scabbard to a belt. It normally has a loop designed to wrap around the scabbard attached to another loop for the belt.

Frost Cutlery Company:  A company owned by Jim Frost. The company owns a a variety of Trademarks and produses the TV show, Cutlery Corner Network. Frost sells mostly its own house brands via the TV show but also sells knives made by other companies..

Frost Wood: A trademarked name for a laminated wood used by Frost Cutlery.  See laminates.

Frozen Heat: A proceess developed by Robeson in which knife blades are heat treated, cooled to room temperature in an oil bath then placed in a deep freeze of around -170° F (-112° C) and then given another heat reatment to relieve stress before receiving a final tempering heat.

Fuller:   A groove forged in the sides of many large bladed knives, normally along the back of the blade which adds strengths and while also lightening the knife.   This is sometimes called a blood gutter or blood groove under the misconception that it is there to allow blood to begin flowing from a wound. A pre vent the knife from being stuck in the incision.

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