Here are some key details about the tool:
Function: It does not actually sharpen a blade by removing metal, but rather straightens the edge to maintain sharpness.
Material: Typically made of hard steel, sometimes with a ceramic or diamond coating.
Handle: The handle is designed for a firm and safe grip.
Length: Often ranges from 30 to 32 cm.
Usage: The knife is drawn across the steel at an angle to realign the blade edge.