The ACRO YURAGI ZERO very gently removes just 10% of the hair with each cut allowing for a precise refining for that perfect sculpted look. Blending Shear 21 teeth Cutting Ratio 10% Blade/Teeth Position: Regular The ACRO YURAGI 4 removes slightly more hair at 15% cut ratio. This tool creates a delicate finish leaving fine blending for lived in texture. Thinning Shear 21 teeth Cutting Ratio 15-20% Blade/Teeth Position: Regular The ACRO YURAGI 6 creates depth while removing bulk all without leaving a cut line. The 6 is the most popular model within this series. Thinner X Texturizer Combo 19 teeth Cutting Ratio 25-30% Blade/Teeth Position: Regular The ACRO YURAGI 10 is a texturizer. With a cut ratio of 40%, it is proper chunker with the signature Acro handle & straight handle shank. Texturizing Shear 16 teeth Cutting Ratio 35-40% Blade/Teeth Position: Regular