Slatwall Inserts are for Slatwall Panels. one pack of our slatwall inserts contains 23 pieces. This is enough to cover 2 of our 1200mm x 1200mm panels. So, if you are buying a pack of 20 panels you only need to buy 10 packs of inserts. All slatwall inserts will protect and hide the screws but Aluminium slatwall inserts will take more weight than the P.V.C Inserts.