Work Tools International 34011 4-Inch WhizzFlock Paint Roller Cover The open-celled construction allows high pick-up and delivery, while thousands of micro flocked fibers lay the coating on smoothly Typically no laying off or back rolling is required to achieve the desired thickness or smoothness WhizzFlock actually allows the user to roll where they might otherwise spray The rounded edges eliminates a flow of paint from the ends of the tool that can product lap marks