Difficulties for designing blade edge:
Investigating the cutting performance in micro, nano unit.
Blade edge technology:
Adding top edge (former products were side edge only) enabled to cut where it aimed, and to catch deeper hair.
Also to use for ear, eyebrow, mustache trimming.
Inner blade patented.
Particular about details:
Improving safety by lessen the top hole size.
Able to clean with water. Finger grip to pull out/in inner blade easier.
After all the efforts, came to produced the good product.
Blunt cutter pulls hair and make pains. If at using for nose, that will cause eyes to water.
Once you use, you can feel the difference with other products.