Usage Tips: Package & Size: You will receive a set of tree stump removal tools, including 12 copper nails, 1 stainless steel nail, and 1 cobalt drill bit. The quantity is sufficient for daily use and replacements. The size of the copper nails and stainless steel nail is 3.5 in x 3.5 mm. The drill bit nail size is 2.7 in x 3.5 mm. Premium Materials: These hardware nails are made of pure copper and stainless steel, offering durability, rust resistance, and corrosion resistance for long-term use. The drill bit is constructed from cobalt-infused high-speed steel, providing resistance to heat, wear, and deformation. Tree Stump and Root Removal: The copper nails help disrupt tree growth by releasing copper ions, assisting in the removal of trees, stumps, and roots. How to Use the Nails Set: Drill pilot holes into the tree roots using the included drill bit and stainless steel nail. Insert the copper nails into the pilot holes, then evenly space and hammer them around the base of the stump. Protect Surrounding Plants: This method allows for tree stump and root removal without harming nearby plants. Color: Copper and silver Material: Copper Package Contents: 12 copper nails (9 cm), 1 stainless steel nail, 1 drill bit Note: Light reflection and display differences may cause slight variations between the image color and actual item. Measurement may vary by +/- 1–3 cm.