CO-FRIENDLY MATERIAL: Adopt durable & non-toxic ABS material,which is safe for baby and hard to break. And the smooth surface of the lock effectively prevents your baby hands from being hurt. EXTRA LONG U SHAPED HANDLE: Sliding design & 7.87 inches handle make it flexible to adjust the lock for catering to different interval of door handles. UNIQUE DESIGN: Dual buttons design, switch + insurance lock, makes the operation of release difficult for a child, but easy for an adult. EASY OPERATION: Just finish the installation in seconds without tool or drill needed. Just open the insurance lock to lock in the closed door handle ,and slide the bar until the lock can't move further, finally turn off the insurance lock. USE WIDELY: Suitable for all kinds of mushroom shaped knobs and D-shaped or annular handles, such as cabinets, side-by-side refrigerators, cupboards, storage doors and so on.