C1-12 / C1-14 / C1-16: Standard grip nippers with jaw lengths measuring size 12 (approx. 4?.5 mm), size 14 (approx. 5?.5 mm), and size 16 (full jaw).12Z / 14Z / 16Z: Variants featuring specialized single or double-spring mechanisms for enhanced tension control and smooth leverage.C555 (or D-555): Full-jaw styling designed for broader surface trimming and reliable salon or home pedicures/manicures.