Singer Lint Brushes are 4.25in, have comfort grip handles, and soft nylon bristles. The abrasiveness of lint, dust fibers and stray thread can shorten the life of your sewing machine. These lint brushes are designed to clean the delicate and hard to reach areas of your machine. Clean frequently around the bobbin case, switch plate, sewing needle and clamp, feed dogs and tension control to help maintain maximum machine performance. Nylon Angled-Edge- Bristles are from 1-1/8in to 1-3/8in length.