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Duo-Fast’s DF175-CN fastens synthetic roofing underlayment and felt quickly, says the maker, and — unlike other cap nailers — uses standard (120-count) coil roofing nails to secure the caps. To convert to nail-only fastening, the user simply pushes a button to shut off the cap feed. The tool has a tool-less adjustable depth-of-drive and a quick-clear nose. It drives nails from 7/8 inch to 13/4 inches and costs $450.

Duo-Fast, 888/631-2020, duo-fastconstruction.com.