Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Rotozip Circle cutting in plaster

I bought the Circle cutting attachment for cutting circular holes in a plaster ceiling for can lights. Previously I have used an electric jigsaw for this, but the RotoZip is wonderful as long as you use a 1/8" solid carbide bit. Also be sure to drill a starting hole because of the danger of breaking the bit on the first insertion.