ADVANTUS-Tim Holtz Idea-ology: Faucet Knobs. These decorative metal knobs make perfect accent pieces on mixed media projects and home decor items. Each one has a threaded screw hole on the back and can be used as a decorative pull; knob; or adornment. This package contains four metal knobs ranging in size from 1 to 1-1/2 inches. Imported.