Fangrui Product Details Complete Stump Removal Kit: Each Package Includes 15 High-quality Copper Nails (3.14 Inches) And A Robust Cobalt Drill. This Combo Is Designed To Meet All Your Tree Stump Removal Needs, Ensuring You Have Enough Tools For Either Single Or Multiple Projects. Effective Tree Stump Elimination: Utilize These Copper Nails To Release Excessive Copper Ions, A Proven Method To Halt The Growth And Gradually Unwanted Trees, Stumps, And . This Strategy Is Both Simple And Effective, Requiring Minimal Physical Effort. And Robust Construction: Made From Pure Copper, These Nails Resist Rust And , Promising And Reusability. The Included Drill Bits Are Crafted From Cobalt-containing High-speed Steel, Designed To Withstand High Temperatures And Wear, Ensuring Precise And Effortless Drilling. User-friendly Application: Copper Being A Softer Metal, The Provision Of A Cobalt Drill Helps Create Initial Holes In Tree Stumps For Easier Nail Insertion. Simply Hammer The Nails Evenly Around The Stump Base For Optimal Results