2 Safety 1st Secure Mount Cabinet Locks – Link

Amazon has this currently marked down to only 75¢.

This was selling for $4.49 before the price started to drop and is now its lowest ever on Amazon.

• Child-resistant lock helps keeps cabinets off limits
• Works on cabinets with handles or knobs; Easy for adults to use and install
• Adjusts to fit cabinets with knobs or handles up to 4.5″ apart
• Remains attached at all times, but hangs conveniently out of the way when not in use
• Attaches easily to knobs with no drilling required