No Drill No Tools 100% Blackout Roller Shade | UV Protection | Easy-Care Fabric | Roller Blind for Windows & Doors | Pull Down Window Shade - Grey (21" W x 78" H)

As long as you install them right and get the right size these block out everything.

I love these blinds! Just had my bathroom remodeled and the inside window sill and surrounding was are now covered in porcelain and I didn’t want anyone to drill through the new porcelain! Great compromise to block out the heat and morning sun! Easy to install. Shipped expeditiously

The light-blocking capability of this curtain is remarkable. However, caution is advised during installation, particularly with the chain mechanism, as it may require careful handling. The operation wasn't entirely smooth, and I recommend considering a string mechanism for enhanced durability. Having said that, the pricing of the curtain appears a bit expensive, especially if I were to purchase curtains for my entire house.

Actually was easy to install and has stayed there for many raisings and lowerings. Way more than i expected.

These are not worth the price. Very cheap plastic screws. I bought 2 and one was missing a piece, wouldn't tighten at all. I am returning them and went to Menards and found some very nice ones for a fraction of the price. I do have to screw them in, but it's very easy to do, and they won't come down when I try to close them. It's a nice idea that just doesn't work.