Scratching post

The post is mounted vertically in a wide base, which allows the cat to stretch upward on its rear legs and scratch freely without tipping it over.

Surfaces vary: the post may be covered in sisal rope, upholstery fabric, the jute backing of a piece of carpet, or sections of corrugated cardboard.

[1] Other kinds of scratching posts are more elaborate, with several levels of horizontal platforms for climbing and cozy cave-like areas where cats may hide.

Smaller scratching surfaces may consist of something as simple as a piece of carpet turned upside down, or a flat pad of woven sisal with a loop to allow it to hang from a doorknob.

These functional reasons include removing the outer sheath of the nail, exercising the muscles of the paws, and stretching.