Correct would be to double-sided thinning scissors, thinning scissors to name and to call the one-sided thinning scissors, thinning scissors. But as it always comes back to confusion, we have made it easy simple.

The thinning (double-sided serrated).

The thinning is is serrated on both sides. The cutting blades are alternately notched to detect not all of the hair. With a thinning of the hair a strand is cut about 1/3. The thinning should be used by experienced hairdressers since it is more difficult to perform and you have to very carefully cut.