1. General Sewing Thread: This is the most common sewing thread and is suitable for most general sewing projects. They are usually made of polyester or cotton fibers and are available in a variety of colours.

2. Strong thread: This thread is made of high-strength polyester fibers and is suitable for projects that require stronger seam strength, such as sewing heavy or durable materials.

3. Silk thread: Silk thread is woven from natural silk and is ideal for use on lightweight fabrics such as silk and muslin. They are characterized by luster and softness.

4. Elastic thread: Elastic thread is a special thread with elasticity, which is suitable for projects that need to sew stretchable materials, such as sportswear, underwear and elastic fabrics.

5. Metal wire: Metal wire is usually made of aluminum, copper, or other metals and is used to add decorative details or embroidery. They can be used on a sewing machine, but require special wire guides.

6. Embroidery thread: Embroidery thread is a kind of thread of different thickness, which is used for hand embroidery or machine embroidery. They are usually made of cotton, silk or polyester threads and come in rich colors and luster.