We tested each doorknob cover and lever handle lock on two doorknobs and two handles in our testing lab. Here’s what we looked for.
Ease of installation: We evaluated the number of steps to install each cover or lock, as well as the number of tools required. “We count the number of steps from the manufacturer’s installation instructions and add any steps that may be missing for a proper installation,” says Amézquita, who gives examples such as cleaning and drying the surface before installing, or adding in extra wait time for an adhesive to set. This way, you get a clearer picture of the work involved.
Ease of use: Testers evaluated how easy each knob or handle was to use by first turning the knobs with their dominant hand and then their nondominant hand. We also evaluated how easy the covers were to clean.
Force to disengage: We measured the minimum amount of force in pounds required to disengage the cover or lever handle lock, which is akin to pulling the cover apart and removing it. Products with a higher minimum force are estimated to better withstand the force of a determined toddler trying to open a door. Because every child is different, we used a force gauge to get an objective measure for every sample. (Note that we didn’t bring actual toddlers into our testing lab for this test.)
Overall design: Our testers evaluated how well a babyproofing product integrates with their home’s existing decor. Was it invisible—or an eyesore? You’ll probably need to keep your babyproofing products in place for several months, if not years, so design can be a big factor when making your choice.
