Why you need it: Are you concerned that your child might accidentally lock themselves in a room while playing? Or worried about the risks of leaving doors unlocked when young children or pets are home alone? With our childproof door lock cover, you can install a rotating back-lock safety deadbolt and reduce the risk of accidental operation. Keep your child safer and gain peace of mind knowing the door is secure. Hidden switch design requires coordinated finger pressure to disengage: the cover must be squeezed inward and then toggled upward to opensimple for adults to operate, even with one hand while holding a child or carrying items, but difficult for young children to understand. This helps prevent children from locking themselves inside a room and being unable to open the door, avoiding potential distress. Simple installation: No drilling or tools required. The deadbolt cover features a strong, non-marking adhesive backing tested to withstand 1520 pounds of pull force, ensuring it stays securely in place and resists removal by children. Just remove the protective film and press firmly onto the deadbolt latch. Ideal for renterseasy to install and remove without damaging doors or leaving residue. Environmentally friendly and stylish: Made from high-quality, BPA-free ABS plastic, the cover has a durable construction with a smooth, edge-free surface to help protect children from injury. The sleek black and clear design blends seamlessly with bathroom, bedroom, childrens room, playroom, or living room doors, offering both functionality and modern aesthetics. Wide compatibility: Includes four door knob safety covers. Each measures 3.14 x 1.57 x 1.57 inches with an inner diameter of 1.57 inches, fitting most standard deadbolts. Please measure your deadbolt before purchase to ensure proper fit.