Buchanan Stacker Is Made Of High-Grade Carbon Steel For Enhanced Strength And Durability. It Has A Smoother Plastic Saddle To Prevent Damage To Cable. It Can Be Used With Wider Cable Such As Romex Wire Nm And Uf. Stacker Is Provided With Rust/Corrosion Resistant Zinc-Plated Nails. It Measures 7 Inch X 5 Inch X 1 Inch. Stacker Meets Rohs Compliance.