My fault is that I didn't understand exactly what I needed and was in a rush to buy something to get next day delivery. Dimensions are clearly stated in the listing. BUT be aware that there is a big gap between 5/16" and 1/2", especially in the fastener world. My anchors were #10, which is probably 3/8" or maybe 7/16", so I had a choice of undersized hole or oversized hole. If you're lucky you're on mortar and have room to widen the hole by sawing 5/16" sprockets or 2 sprockets because instead of doubling up on some of the smaller sizes, you'll have to fill in the missing sizes