TATOO
Troops
Custom manufacturer of medical needles are made from stainless steel & low density polyethylene.
Most tattoo needles are made of some grade of stainless steel. Surgical stainless steel is very common in tattooing needles.
bone
You cant purchase body piercing needles unless you are a licensed business, so don't worry about it.
Early sewing needles were made out of bone, wood, and clay. Needles today are made out of carbonized steel or nickel and have better durability.
Compass needles are typically made from a ferromagnetic material such as steel. Some compass needles may also contain a small amount of cobalt or nickel to enhance their magnetic properties.
ChalkChalk
Yes. Not the steel or plastic needles we use today, but rather needles made from bone or wood splinters.
Simplicity of design: Growth made easier. Specialization: Allows body organs to grow differentially.
needles olive tree
Yes, it is just describing the material the needles are made from. The most common modern needle types are metal, acrylic, and bamboo.