All The Features And Superior Performance Of The Classic Multi-Purpose Screw. Manufactured From A2 Stainless Steel. Ideal Where Ultimate Corrosion Resistance Is Required When Fixing To Softwoods Hardwood (Pre-Drilled) Chipboard Mdf And Plastic. Stainless Steel Must Be Used Where There Is Corrosive Environment And/Or The Base Material Has Inherent Corrosive Characteristics E.g. Green Oak.PTDTIM40050CLAPSS