Just bought a new one. Apply a few drops of oil, load the nails and try to attach the 5/8" plywood to the concrete masonry block, which is about 1500 psi compared to 3000 for the concrete slab, but the 2" nail doesn't flush and driven about 1 psi /4". the nail was exposed. Increased the pressure to the maximum but 3/8" of the nails still didn't drive. Contacted the seller who contacted the manufacturer. The manufacturer says plywood is more durable than wooden planks. Even if it is, you canβ¦