Point the stapler away from your body and from surrounding workers. Disconnect the stapler from the air supply hose.
Release the stapler's clip by depressing, pushing or pulling the tab or button at the bottom of the tool's cartridge. Slide the clip away from the cartridge to reveal the inner channel or "rail." If staples remain in the channel, clear staples from the channel.
Fit a new strip of staples onto the clip's channel. Orient staples according to manufacturer's guidelines; placing staples backward can damage the tool or cause personal injury.
Push the clip back into the cartridge until the clip snaps into position. Reattach the air hose to the pneumatic stapler.