Tungsten alloy nail fishing sinker is thin, nail-like weights inserted into soft-plastic baits (jerk baits, sticks or finesse worm) and usind barbs to help keep them in place.
Tungsten fishing sinkers are weight used in conjunction with a fishing lure or hook to increase its rate of sink, anchoring ability, and casting distance.
Fishing jigs which compose of metal alloy sinker and a hook are one type of fishing lures and are one of most productive baits today, especially in water clarities from slightly murky to clear.
Tungsten worm weights, also called tungsten barrel weights in some countries, are known as "Diamond Series" because of they are drilled, beveled and diamond polished to avoid damaging the line.