The Martin brown leather guitar strap button is perfect for any acoustic guitar player who does not have a strap button installed on the heel of the guitar. The black leather guitar strap button by Martin is a clever, stylish way to attach a strap to the headstock of an acoustic guitar. This brown leather strap button will not leave marks or scratches on the headstock of a guitar like many others do. Perfect for the player who wants to maintain the traditional, stock look of an acoustic guitar.