Sewing machine needles universal Schmetz pack 10 needles nm 80/12

Universal sewing machine needles Schmetz size 80/12 (pack of 10)

Sewing machine needles from the Schmetz brand are well‑known and of excellent quality.

Use universal sewing machine needles for general sewing tasks. If you are working with tricot, stretch fabrics, denim or leather, choose the appropriate special needles. The same rule applies to needles as to fabrics: using the correct type always gives a better result. Also check the needle size.

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TIP: a needle kan work for 8 hours, afterward it is blunt and needs replacing.

That does not mean that you have to exchange the needle after one day. Look at it this way: if you should push the pedal and keep it sewing for 8 hours straight the needle is blunt 
Easiest way is to put a new needle in the machine when starting a new project...