No Drill No Tools Blinds: Letau 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 45 seconds with no tools-no drill, screws, or brackets. And it can afford maximum 35kg. Fit All Kinds of Walls, like woodiness metope, tile marble, concrete wall. Innovation Cordless Design: Built-in the robust constant force spring-loaded mechanism, smooth and quiet. The innovation cordless design provides a clean, tangle-free look to the window. Safer for children and pets. Easy to raise up or lower down evenly to gently filter sunlight and stay balanced automatically at whatever position you stop. Please follow the below steps to submit the order: STEP 1, Select your color. STEP 2: Hit the "customize now" button on the right side to fill out your customize dimensions. STEP 3: Choose inside or outside mount. STEP 4: Choose the width and height size,For an inside mount, give us the exact inside opening size of window, we will take a 3/8" deduction based on opening size. you need at least 1-3/4"depth for inside mount. For an outside mount. the proposed shade size is 3-5inch wider and higher than window frame size so it fully cover the window and trim. STEP 5: Choose the Roman shade or Top down bottom up Style. STEP 6: Choose the liner or no liner. STEP 7: Add to Chart. The hardware bracket can be mounted on the top window frame or side window frame ,patio door or on the wall. If you are not absolutely certain, we recommend ordering one swatch or one blind to double check the quality ,measurement and color first. Letau 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 45 seconds with no tools-no drill, screws, or brackets. And it can afford maximum 35kg. Fit All Kinds of Walls, like woodiness metope, tile marble, concrete wall. The innovative cordless system ensures safety and ease of use. The roman shades are made of selected natural Bamboo and Linen material ,The texture of the natural wood gives you light filtering functions. These window blinds are perfect for restaurants,offices , hotels, gazebos, gardens, resorts, terraces, bedrooms, study, meeting room balconies, you also could put it in bedroom , linving room, children room since we provide the blackout liner options, Please note, this is intended for indoor use only. Do not place your shades in moist, damp environments.Filters incoming light in a natural way.