Bali Aluminum micro blind that is the micro version of the Bali aluminum program. Heavy duty 1" x 1 1/2" steel headrail. Sleek, light-blocking headrail requires no valance. Clutch wand tilter and crash proof cord lock. Color coordinated components. Hidden bracket system for top and back mount blinds. Mounting depth required for Inside Mount is 3/4". Flush inside mount is 1 3/4" (which includes enough depth for mounting brackets) These slats still have holes in the slats-the only notable difference is it has a flap at the top of the headrail that helps with light blocking!