Nail file
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A nail file is a tool that can be used to gently grind down and shape the edges of nails. They are often used in manicures and pedicures after the nail has been trimmed using appropriate nail clippers
Nail files
Joe Niekro
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Joseph Franklin Niekro was an American professional baseball pitcher. During a 22-year baseball career, he pitched from 1967 to 1988 for seven different teams, primarily for the Houston Astros.
Nail file
…deliberate manipulation of the ball using an emery board is classified as cheating in baseball and cricket. In a 1987, Major League Baseball incident, Joe Niekro of the Minnesota Twins was caught with an emery board in his pocket and suspended for ten games. He claimed it was for filing his nails. Glass nail…
Niekro in 1976