Possible Clues:

• Item from a book
• It can't light just anywhere
• Fire starter from a book
• Not a dangerous striker? The facts may appear different
• It needs a special surface to ignite
• Marriage for security cannot be struck just anywhere
• Home striker needs protection from injury before game
• One of 20 in a book, typically
• One won't strike at the slightest provocation
• Sort of net used at game limited striker