30" x 10" Plastic Concrete Sliders made from from tough, heavy-duty ABS plastic. Durable construction provides a toughness and impact resistance for harsh use on a job site. The ABS plastic resists corrosion from use and makes the boards easy to use and clean. The ABS plastic material can be used with white and colored concrete with confidence. The knee boards has rounded edges to prevent digging into concrete. Toe bracket secures the foot and allows for an ease of back and forth movement along the work surface.