Package & Size: You receive a set of tree stump removal tools, including 12 copper nails, 1 stainless steel nail, and 1 cobalt drill bit. The copper nails and stainless steel nail measure 3.5 in x 3.5 mm; the drill bit measures 2.7 in x 3.5 mm. Sufficient quantity for daily use and replacements.Premium Materials: These hardware nails are made of pure copper and stainless steel, offering durability, rust resistance, and long service life. The drill bit is constructed from cobalt-infused high-speed steel, providing resistance to heat, wear, and deformation.Tree Stump Removal: Copper nails help inhibit tree growth by releasing copper ions, assisting in the natural decomposition of stumps and unwanted trees.How to Use: Drill pilot holes using the included drill bit and stainless steel nail, then hammer the copper nails into the holes. Space the nails evenly around the base of the stump for best results.Protects Surrounding Plants: This method targets the stump without harming nearby vegetation.Color: Copper and Silver Material: Copper, Stainless Steel, Cobalt High-Speed Steel Package Contents: 12 x Copper Nails (9 cm) 1 x Stainless Steel Nail 1 x Drill Bit Note: Light reflection and display settings may cause slight color variations between the product and images. Allowable measurement error is +/- 1–3 cm due to manual measurement. Sold by YJL official store