These needles are usually used for your clients that are looking for shaded, or 'fog', eyebrows. There are 19 needles in each microblade, which is designed to be uniquely slanted at a 45 degree angle.
Handles for these needles can be found here.
Microblades are individually sterilised. Do not use if package is broken.
In the video below you can see how Tina Davies uses a stippling method to fill the gaps between between lines with this 19 pin angled needle. You can skip to 6:25 to see the needle in action: