Dreambaby Secure -A- Cabinet Handles & Knobs Security Locks - Child Proof Sliding Safety Locks -Silver - Model F1003 SUITABLE FOR MUSHROOM SHAPED KNOBS: Suitable for use with mushroom shaped knobs, with a stem up to 0.75 inch in diameter SUITABLE FOR D-SHAPED HANDLES: Suitable for D-shaped handles that are up to 3.75 inch apart EXTENDABLE: Dreambaby Secure - A - Lock is extendable to fit most knobs and handles. With no tools required EASY TO USE: Simply press in top and bottom center button and pull out Secure-A-Lock to the desired length PERFECT FOR CHILD PROOFING: Help prevent children from opening cabinets and cupboards doors with potentially dangerous contents