RIDGID® Traditional and Close Quarter crimp tools are the right choices for ASTM F1807 fittings.For use with ASTM F1807 black copper crimp ring system for PEX tubing.Over 20% lighter than traditional PEX crimp tools.Up To 33% less force required to produce a crimp, compared to traditional PEX crimp tools.Compact tool length for access to tight spaces.Four tools available in (3) sizes: 1?2", 3?4", 1" and a Combo 1?2" and 3?4" Tool.Easily adjustable lock screw for tool calibration.All tools come with a Go/No-Go gauge.