Heavy Duty Stainless Steel kneeboards are made of #16 gauge stainless steel. The 28 x 8-inch contoured sliders prevent digging into the concrete. Polished stainless steel reduces the risk of corrosive problems on these heavy-duty kneeboards. These durable sliders are easy to use to protect your concrete while finishing. Toe bracket secures the foot and allows for ease of back and forth movement along the work surface. Each slider features an adjustable knee pad to provide comfort on your knees as you move around the cement. Lightweight polyurethane knee pads are removable/replaceable. The knee pads securely attach to knee with two adjustable web straps to hold pads to knees. Each pad is molded in one piece to eliminate seams that can lead to chafing and discomfort. Remove the knee pads and use them on their own for additional versatility.