Polyester No Drill Blinds: LazBlinds patented technology No Tools-No Drill system allow it no need to drill any holes on your window frame, great for Renter, Landlord, and Home Buyer. Easy to Install in 30 seconds. Fit All Kinds of Walls, like woodiness metope, tile marble, concrete wall and rough tile. Inside Mount ONLY. For better internal installation, a standard 2/5 inch deduction is made to the shade width. The actual blind size is 29 3/5" W x 64" H, the unique spring rod can extend 1 inch in total, allow the blind to fit for window width 29.7-30.6 inch, blind height can adjust from 0" to 64". (Pls Note) Minimum 1 1/5" depth of window frame required for inside mount. REAL Blackout Shades: The silver-plated layer inside the cell can completely keep out the sunlight and uv ray. Offering a real dark environment, bringing you a good night's sleep during the day. Perfect for bedroom. Cordless Blinds for Windows: Easy to raise up or lower down. No tangled or exposed cords! Suitable for families with children and pets, guarantees the safety of your family. Non-sagging 3/5'' cell structure not only provides a uniform appearance, but also insulate your home against outside thermal energy in summer and keeps outside cold away from your warm house in winter. Also, our curtains can reduce the noise from outside to provide you a better environment to work or sleep.