Our copper nails help to trees, stumps and by releasing excess copper ions that disrupt tree growth. It does not affect the surrounding plants. The stump removal tool includes 23 copper nails, 1 stainless steel nail, and 1 cobalt drill bit nail, enough for your daily use and replacement needs. Copper and stainless steel nails measure 3.5 x 0.1 inches and drill nails measure 2.6 x 0.1 inches. These hardware nails are mainly made of pure copper and stainless steel, which are strong, rust and have a long service life; the drill bit is made of cobalt containing high speed steel, which is heat , abrasion and distortion . No need for complicated tools or professional skills, our tree copper allows you to remove stump with ease, it's ideal for home gardening enthusiasts and professional alike., Weight: 0.36155810968 Pounds, Manufacturer: Frewurwer