Simple Step‑by‑Step Use: First use the included drill bit or steel nails to create pilot holes in the stump or major roots, ensuring proper depth and spacing. Then insert the copper nails firmly into the pre‑drilled holes so they penetrate fully without bending. High‑Purity Durable Materials: These copper nails for killing trees, stumps & roots are made from approximately 99% pure copper for excellent corrosion resistance and longevity outdoors. Gradual Tree Stump Killer Action: tree stump killer nails work by releasing copper ions inside the wood, interfering with the stump's water and nutrient transport over time. This natural process requires patience; results are not immediate. Targeted & Environmentally Considerate: Our pure copper nails to kill trees are designed to be placed directly into unwanted stumps and invasive roots, allowing you to focus treatment on specific trees. Color: As Shown Material: Copper Package Contents: 10 copper nails, 1 steel nail, 1 drill bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.