The CrimpRite 1/2" compact angle head crimp tool is a tool designed to secure 1/2" copper crimp rings (not included) into place within PEX piping systems. The angled head allows easier access to connections in tight spaces. There are no loose components, jaws to change, or adjusents to be made to create a connection. Connections may be checked for security using the Go/No-Go Gauge.