Porter-Cable says its new line of six pneumatic woodworking nailer and stapler kits offer a maintenance-free motor design and on-board features to deliver consistent performance and long life. Designed with an oil-free motor, the new nailers and staplers reduce the possibility of work surface contamination and promote hassle-free operation, the company says. The motor design utilizes a dual-stack ring design and an internal piston catch. By holding the piston at the highest position in the cylinder, the piston catch ensures accurate nail setting and maximum power on each shot, PORTER-CABLE adds.