Several knob sets include screws sized to fit doors approximately 0.79–1.57 inches (20–40 mm) thick.
Typically you insert the knob bolt through the front hole, thread the accompanying nut or screw from the back, start threading by hand, and finish tightening with a wrench or by hand as needed.
Yes—many knobs include bolts or screws that can be trimmed to match door thickness. Examples in these listings show 1‑inch bolts that can be trimmed and screws that can be shortened to fit doors in the roughly 0.79–1.57 inch range.
The knobs are made from a range of materials, including acrylic, ceramic, zinc alloy, glass, and aluminum alloy.
Most descriptions state no special tools are required and the knobs can be installed by hand; however, one source suggests using a wrench for final tightening if needed.
Most listings recommend wiping knobs with a soft, dry or damp cloth. Some finishes are described as low‑maintenance and resistant to water and grease.
Displayed diameters include about 0.94 inches, 1.1–1.22 inches, 1.5 inches, and 1.57 inches, depending on the pack.
