The ergonomically designed Aerico 90 tool drives ASM-144 pins and AKN-144 pins into both steel and concrete substrates. At 150 psi air pressure, this tool will fasten plywood underlayment to concrete, or attach an OSB roof panel to 3/16” steel members. Adjust the air pressure to 120 psi and the Aerico 90 will fasten fiber cement siding to concrete masonry units. Each Aerico 90 is hand assembled when purchased.