These are wonderfully clear strong shelf brackets. Made of a combination of 1/4" back and 1/2" support piece these brackets are strong and beautiful to look at. The back is 10" x 3" wide and the piece of 1/2" that holds the weight is 6" x 6". These come with two countersunk holes for a #6 screw that is not supplied. The reason for that is the kind and length of screw that you would use depends on what material you are fastening this bracket to. This pair of brackets can hold up to 30 lbs with out a problem. We make shelves for these brackets out of 1/2", 3/4" or 1.00" at etsy.com/ The price listed is for a pair of "L" brackets. We have listed white and black as an option but they can be made from many other colors, just ask. Thank you for shopping with us at PlasticMart.