Material: METAL . Thicker 12g steel that holds more weight • Efficient wire-form design that transfers object weight from hole to the wall itself;" hang up to 40 lbs • EZ self boring tip requires no tools: just push, twist, and insert • Made of super-strong spring steel that eliminates excess or unsightly wall damage • No wall stud is required so you can hang your picture exactly where you want it • Hook secures tightly to wall • Unique tilt-back tip directs tip of hook away from backing material • Galvanized zinc coating provides rich silver finish and prevents corrosion