The manufacturer claims the DFCR17C is the world’s first fuel-powered cordless roofing nailer system. Designed to be powerful, lightweight, and compact, the tool drives two nails per second and holds 120 nails per coil. Featuring an adjustable depth of drive, an adjustable shingle guide, and a soft grip handle, it will drive 2,200 nails per charge and 950 per fuel cell. Cost: $529. Duo-Fast Construction. 888-631-2020.