These anchors made an instant impression. Quality and for the first time! I've tried every variation of paper mache/drywall in my house that appears to have been built by a contractor who wasn't too concerned about even stud spacing! This is by far the best, easiest and cleanest install and for the first time in years I've been able to hang two shelves without losing a single anchor in the crawl behind or drilling a second set of holes! The only brand of anchors I will ever need! Thanks very much!