I've been using drywall anchors for over 50 years and have never dealt with this type of junk. He promised his wife to hang three racks for plates, 2 screws per rack. Each hole is marked with an awl. 11 anchors delayed, 6 installed, 3 broken in hole, 2 with broken cutterhead, project completed. Not decided yet what to do with the remaining 89 marriages. Most likely garbage, no return to Revane. Lesson learned from buying CHINESE junk.