Usage Tips:Package & Size: You will receive a set of tree stump removal tool, includes 12 x copper nails, 1 x stainless steel nail, 1 x cobalt drill bit nails, sufficient quantity to meet your daily use and replacement needs. The size of copper nails & stainless steel nail is 3.5in x 3.5mm, the drill bit nail size is 2.7in x3.5mm.Premium Materials: These hardware nails are mainly made of pure copper and stainless steel, which are sturdy and durable, rust proof and anti-corrosion, and he a long service life; The drill bit is made of cobalt containing high speed steel, which is resistant to heat, wear and deformation.Remove Tree Stumps and Roots: Our copper nails disrupts tree growth by releasing excessive copper ions, helping to eliminate trees, stumps, and roots.How to Use the Nails Set: Firstly, make pilot holes in the tree roots by drill bit and stainless steel nails, then hammer the copper nails into the pilot hole, finally drive the nails out evenly around the base of the stump.Protect Surrounding Plants: Copper nails are used to remove tree stumps and roots withoutfecting surrounding plants.Colour:Copper & SilverMaterial:copperPackage Contents:12 x copper nails(9cm)1 x stainless steel nails1 x drill bitOnly 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.