I'm at the home center, trying to remember whether my sander takes five- or eight-hole discs. I've got a fifty-fifty chance, but if I guess wrong, the dust collection on my sander won't work right. Thanks to 3M, I can't pick the wrong disc. The company has hit a hole in one with its Universal Hole random-orbit sander discs, $11 for 10 discs. They fit 5-in.-dia. five-hole or eight-hole sanders. It's a simple idea. The holes are slightly elongated, making them large enough to cover five- or eight-hole patterns. Although its holes are larger than normal, therefore removing some abrasive, it works as well as a standard disc. The Universal Hole discs are only available in 5-in. hook-and-loop discs in the standard array of grits. The price is comparable to the cost of other high-quality abrasive hook-and-loop discs.
3M, (888) 364-3577, www.3m.com, Universal Hole Sanding Discs, $11 for 10 discs.