Youthink pet door 4Way Locking Cat Door for Interior Doors 4Way Locking: knobstyle locks offer four modes: open, locked, inonly (cat can enter but not exit), and outonly (cat can exit but not enter). This provides precise control of your pet's movement between rooms. Durable and energysaving: ABS frame provides strength and durability. The flap is weatherproof and energyefficient, helping protect against extreme weather. Noise reduction: a brush strip reduces noise when pets pass through, delivering a quiet action that won't startle pets or disturb you. Easy to install: includes detailed installation steps and eight screws with caps. Can be installed in doors, cupboards, panels, and walls. Compatibility and applications: designed for interior doors and compatible with doors, cupboards, panels, and walls. Use scenarios: Between living spaces to control pet access, keeping pets in a preferred area during guests or nighttime. In homes with a dog and a cat, use inonly or outonly modes to manage access and prevent unwanted exits or entries. On pantry, laundry, or utility doors to restrict pet access to food or hazardous items while still allowing convenient passage. Materials and performance: ABS frame, weatherproof flap, energyefficient design, 4way locking. Includes 8 screws and caps for installation.