Diaply specific category product with column item wordpress

<div class="row">

	        <?php
	            $args = array( 'post_type' => 'product', 'posts_per_page' => 8, 'product_cat' => 'Leather', 'orderby' => 'title','order'   => 'ASC', );
	            $loop = new WP_Query( $args );
	            while ( $loop->have_posts() ) : $loop->the_post(); global $product; ?>




	                    <div class="col-md-3 text-center leather-item-style">    
	                        <a href="<?php echo get_permalink( $loop->post->ID ) ?>" title="<?php echo esc_attr($loop->post->post_title ? $loop->post->post_title : $loop->post->ID); ?>">
	                            <?php woocommerce_show_product_sale_flash( $post, $product ); ?>
	                            <?php if (has_post_thumbnail( $loop->post->ID )) echo get_the_post_thumbnail($loop->post->ID, 'shop_catalog'); else echo '<img src="'.woocommerce_placeholder_img_src().'" alt="Placeholder" width="300px" height="300px" />'; ?>
	                            <h3><?php the_title(); ?></h3>
	                            <span class="price"><?php echo $product->get_price_html(); ?></span>                    
	                        </a>
	                        <?php woocommerce_template_loop_add_to_cart( $loop->post, $product ); ?>
	                    </div>
	        <?php endwhile; ?>
	        <?php wp_reset_query(); ?>

			</div>