There are many different types of needle files. Some are round, some are half-round, and others are flat and double cut. There are also specialty shapes, such as dental picks and taper point needle files. A good way to know what kind of file you need is to see pictures of a few.
YOCAMIRAGA

A needle file is an essential tool for working on a wide range of materials. These files come in a variety of shapes and sizes and are made of different materials. You should choose the right one depending on what material you are working on. Soft metals need softer needle files while harder metals need harder files.

A good needle file will have a small profile and a short cutting surface. It will also have a rounded handle. It is a great tool for fine details and for the final polishing of surfaces. A good needle file should be comfortable and safe to use. A quality set will also have a non-slip coating, which will make it more ergonomic.

Ningbo Tiangong Great Star Tools Co.,Ltd since 1971,enjoys great prestige in the professional manufacture hand tools company of the circle and now is the important production foundation for hand tools.Ningbo Tiangong Great Star Tools Co.,Ltd has developed from needle file and hundred RMB net capital into a corporation with 280 employees and more than 0.1 billion RMB net assets.Ningbo Tiangong Great Star Tools Co.,Ltd since 1958. The registering capital is about 4.15 million RMB. The company covers 30 thousand square meters, building area covers 23 thousand square meters. Company has more than 280 employees and sales amount was 20 million USD in last year. Its main products include hand tools, wood chisel, wood plane, flat wood bit,cold chisel,SDS&masonry drill bit, file&rasp etc. Company passed ISO9001 and BSCI quality management system, and GS, TUV, FSC product quality certification. Ningbo Tiangong Great Star Tools Co.,Ltd is also the permanent members in Ningbo National Hardware Association.Company main products include: wood chisel, wood plane, flat wood bit,cold chisel,drill bit, file&rasp etc.

Ningbo Tiangong Great Star Tools Co.,Ltd main products market share: 99% products sells overseas, 1% sells domestic and sales amount without tax is 101 million RMB last year.North American&South American 50%，EUR 40%，South Africa 5%，Other 5%。