Lightweight knee boards are made of #16 ga stainless steel. The 28 x 8 in contoured sliders prevent digging into the concrete. Polished stainless steel reduces the risk of corrosive problems on these heavy duty kneeboards. These reinforced, durable sliders are easy to use to protect your concrete while finishing. Rounded edges and corners allow for easy sliding movements across the concrete without gouging the surface. Toe bracket secures the foot and allows for an ease of back and forth movement along the work surface. Each slider features an adjustable kneepad 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. The knee pads are replaceable (Kraft Tool Co. WL080). Proudly made in the USA. Kraft Tool Co. has been an American manufacturer of quality hand tools for the concrete, masonry, asphalt, plaster, drywall, tile, floor covering and leveling trades for over 35 years.