I mainly use a 1/8" pry bolt and wing nut to attach towel rails, towel rings and a wall coat rack that accepts drywall. The lever-lock bolt and nut option is the best fastening system for wall panel attachment. I used to use plastic drywall anchors (which suck) and then self drilling anchor bolts. The elements I installed began to loosen. My toddler ripped a towel ring out of the wall that was attached with a self-drilling lever anchor. I use 1/8 inch because it requires the smallest hole of the others. It's still a large 3/8" hole to pre-drill, but I'm sure I won't have to mess with re-anchoring again. that I previously bought. Both worked well, but the Hillman Group felt more solid and durable to me. If you think my review is helpful, please vote so it helps others too. Thanks very much!