BonsaiBrain was onto something when he designed the car wash mop! That screw is used in a lot of other things as well. Mops, floor sponges, paint rollers, squeegees, drywall sanders, brooms, etc. Seems to be universal in janitorial supplies. These files are basic Male/Female parts that could be adapted to whatever configuration you need. I've also included two examples that I have used. One is a Female version with a flange to screw onto whatever you need to, the other is an adapter I designed to attach a feather duster to an extendable painter's pole so that I could dust a ceiling fan.