This is a professional haircutting scissors, with different thinning rate to suit different hair styling needs:

**Flat Cut:** Determines hair length. This is its most basic function. Flat cuts directly cut the hair, determining the overall length of the hairstyle, such as shortening bangs or cutting the ends flush with the base.

**15% thinning rate (Fine-tuning Tool):** Suitable for precise adjustments. Used to refine the transition between light and dark areas in gradient hairstyles, address indented areas, create subtle texture, and trim fine hair or the hairline edge. Even beginners are unlikely to make mistakes. It's generally recommended that higher-priced stylists use this setting for post-blow-dry detail adjustments.

**25% thinning rate (All-Around Mainstay):** Suitable for regular thinning. Commonly used to remove harsh lines, soften ends, and blend layers. It's the mainstay for handling the heaviness of most hairstyles (especially men's short hair).

**45% Shearing (Reshaping Expert):** Also known as fishbone shears. Due to its large shearing capacity, it can directly replace flat cuts to create very soft layers, avoiding harsh lines and unevenness. Suitable for quickly and significantly reducing hair volume or creating a strong texture, but requires a high level of skill from the operator.

**55% Thinning (Extremely Thin): ** This is an extremely high thinning level. Used for special styles requiring extreme thinning, or for quickly thinning extremely coarse hair. Use with extreme caution, otherwise it can easily lead to hair loss and hollows.