Mustang wiper arms are splined to the transmission shaft and retained by a high-tension spring clip. Removing the wiper arms for windshield or paint work can easily cause the wiper arms to go flying off, scratching your hood, breaking your windshield, or damaging your windshield molding. Using a pair of wiper arm pliers allows easy, yet controlled, removal of the wiper arms with no drama. Just place under the arm and gently squeeze. The rubber backing on the pliers protects your paint during the process.