03% Sulfur.
Hollow (Grind) - A blade edge ground with a radius, leaving a concave shape above the cutting surface. Also, see picture below.
Integral Pocket Clip - a pocket clip that is molded as part of the handle, rather than being attached with screws.
Jigged Bone - this is bone that has been machined (jigged) in a pattern.
Jimping - refers to machined cuts or cross-hatched patterns on the back of the spine of the knife designed to increase traction of fingers on the knife.
Karambit (Blade) - see picture below
Kraton - a handle material made of thermoplastic polymer.
Kydex - a sheath material made with PVC and acrylic. Fire retardant.
L6 (Steel) - tough and holds an edge well. However, like other non-stainless steel it rusts easily. Some consider this to be one of the best steels available for cutlery. It is also used frequently in saw blades, but any knife made from this material needs consistent maintenance.
Lanyard Hole - this one is pretty self-explanatory. It is a hole in the handle of the knife for a lanyard.
M2 (Steel) - extremely heat resistant. It has about .85% carbon. It holds an edge really, really well, but it can be brittle on large knives.
M390 (Steel) - a high performance blade steel with superior cutting ability and wear resistance due to its high concentration of vanadium and chromium carbides. This is a popular steel used in surgical cutting instruments and in applications requiring a high finish. It features 1.9% carbon.
Mammoth Bone (also molar, and ivory)- Used rarely in custom knives. Found during mining operations in the far north, in areas with lots of glacial activity. The distinctive look is made from erosion.
Micarta - a handle material made by taking layers of linen cloths soaked in resin and pressuring them together. Can be colored several different ways.
Mirror Polish - a blade polished to the point that you can see yourself in the blade.
MOLLE - MOdular Lighweight Load carrying Equipment, typically knives with have sheath attachments compatible with this system.
Moran (Grind) - see Hamaguri grind.
Mother of Pearl - used often in custom knives, has an iridescent, cream color.
N680 (Steel) - a hard steel that contains .54% carbon. It has good corrosion resistance, especially in salt water.
N690BO (Steel) - an Austrian made stainless steel, which is comparable to 440C in performance. This steel has about 1.07% carbon.
Noryl GTX - a handle plastic that is high-strength and very lightweight.
O1 (Steel) - has good edge retention, because it is hard material. Its major problem is that it rusts rather quickly if it isn't maintained. It has a carbon content range of .85-1.00%.
O6 (Steel) - a much tougher metal than O1. This is one of the absolute best edge retention steels.
Orange Peel - refers to the grain polish of some steels, which gives a slightly rougher finish similar to an orange peel.
Plain (Edge) - sometimes called a straight edge. This is an edge on the blade that has no teeth or serrations.
Quillion - this is a handguard that protrudes from both sides of the handle where the blade meets the handle.
S30V (Steel) - very tough, and yet still has great wear resistance. For how tough the steel is, it actually has very good hardness also, which is why many consider it to be one of the best choices for knife making. It has a carbon content of 1.45%.
S35VN (Steel) - considered an upgrade from S30V due to its toughness and chip resistance. However S30V will still hold a better edge. The addition of Niobium and Nitrogen increases corrosion resistance and hardness. Contains: 1.34% Carbon; 14% Chromium; 0%-0.5% Cobalt; 0.5% Manganese; 2% Molybdenum; 0.1%-0.4% Niobium; 0%-13% Nitrogen; 0%0.3% Phosphorus; 0%-0.3% Sulfur; 0.5% Silicon; 0.4% Tungsten; 3% Vanadium.
S90V (Steel) - has superior edge retention. However, it can be almost impossible to sharpen. Right now custom makers are the only ones using this type of steel. Its carbon content is around 2.30%.
Scale - the handle material that is mounted to the tang of a knife.
Serrated (Blade) - see picture below
Sheepsfoot (Blade) - see picture below
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