General description These 25 pieces of copper nails are designed for effective tree stump removal. The set includes 23 copper nails, 1 stainless steel nail, and 1 cobalt drill bit, providing sufficient quantity for daily use and replacement needs. The copper nails disrupt tree growth by releasing excessive copper ions, aiding in the elimination of trees and stumps while protecting surrounding plants. Technical specifications Copper nails size: 3.5 in x 3.5 mm Stainless steel nail size: 3.5 in x 3.5 mm Drill bit nail size: 2.7 in x 3.5 mm Measurement allowed error: +/- 1-3 cm Usage To use the nails set, follow these steps: Make pilot holes in the stump using the drill bit and stainless steel nail. Hammer the copper nails into the holes. Drive the nails out evenly around the base of the stump. Other information Material: Pure copper and stainless steel Drill bit material: Cobalt high-speed steel, resistant to heat, wear, and deformation Color: Copper + silver