These are round shank needles made for commerical embroidery machines.
System DBXK5 SAN 1. System DBXK5 SAN 1 titanium needle. Size 12/80 sold in a package of 10 needles. - Bernina E16

Choosing the right needle is important to ensure quality stitches. Embroidering with a needle that
is too small or too big for the thread and/or fabric may result in thread breaks or skipped stitches.
There are three things to consider when choosing the right needle for the job: fi nish, size and point.
DBxK5 is an established standard system for machine embroidery. This style needle has a medium
point with a larger eye, which allows the thread to fl ow smoothly and helps reduce thread breaks. Its
only downfall is that it is slightly less durable due to its thinner eye wall. For stretch materials, use
ballpoints. For cottons, use sharp-points.
DBx7ST is ideal for metallic threads. It has an extremely large rectangular eye that allows for easy
passage of thread. You may also use size 80/12 needles for metallic threads.