Microfiber pads are optimum shape for smooth, even application of floor finish. Durable construction. Liner controls liquid content and release. Finish bucket is color-coded blue to differentiate use. "Washboard surface" removes dirt and debris from mop pads before wringing. Twist valve empties contents without lifting. Starter kit includes: six microfiber finish pads; one quick-connect frame; one quick-connect handle; and one Finish Bucket.