Per Product Shipping for WooCommerce

Per product pricing – it would be great to be able to delete all rows of per product freight pricing attached to a product by multiple selecting more than one row or “Select All/Deselect All” – currently it is very time consuming to delete 100 rows of postcode data for a product, or I have to delete the product and start again with a fresh per product table in the new product. Importing new costs over the top of an existing table results in duplicate entries for postcodes, so it is necessary to delete existing data before importing new costs.