Ribbed Push-In Rivets feature a round head and barbed body. They are also known as fir tree rivets, Christmas tree rivets and pawl lock rivets. They can be inserted into threaded, unthreaded, drilled and punched holes to form a strong and reliable join. The ribbed design ensures a fast and easy installation. These rivets are designed to be nonremovable. Great for Point-of-Purchase displays and hanging signage.