Aside from blade and handle materials,
the other materials in a knife are those that hold
it together found in the bolsters, linings and rivets.
In custom knives, there are numerous
materials used to make these parts ranging from exquisite
gold and silver to less expensive aluminum and stainless
Brass has traditionally been the material
for bolsters or liners, but it is being replaced in
most commercial knives with more tarnish-resistant
materials. Brass is a relatively soft metal, which
allows it to be easily polished or engraved, but it
also wears faster than other materials.
Nickel-silver, an alloy of nickel, copper
and zinc, sometimes called German silver, is another
popular bolster material. Its clean appearance and
corrosion resistance makes it a popular choice.
Some knives employ bolsters and pins of hard aluminum.
While this material is harder than brass, it helps
create lightweight handles when desired.
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