woocommerce_before_add_to_cart_button action-hook . WC 1.0

Usage

add_action( 'woocommerce_before_add_to_cart_button', 'action_function_name_8550' );
function action_function_name_8550(){
	// action...
}

Where the hook is called

<?php do_action( 'woocommerce_before_add_to_cart_button' ); ?>

<?php do_action( 'woocommerce_before_add_to_cart_button' ); ?>

<?php do_action( 'woocommerce_before_add_to_cart_button' ); ?>

<?php do_action( 'woocommerce_before_add_to_cart_button' ); ?>

Where in WP core the hook is used WooCommerce