As briefly described in the heading these balcony box holder is really awesome! I initially skeptical ordered only one set and was impressed by the look, the good workmanship, the easy installation and perfect fit. In a few minutes installed, no screws or metal parts, so that the balustrade is not damaged. The holder can not be set at the level and depth of the balcony box, but the spacer can be adjusted accordingly. Once the window box held firmly and securely during the storm 2 weeks, I then ordered the next set and am absolutely satisfied with the support! Incidentally recyclable :)