This crimper is designed specifically for use with heat shrink connectors. While certainly not the best quality it is a decent mid grade tool and far better than using the wrong tool on expensive connectors.
This tool will not damage the heat shrink and will yield a strong crimp when used on factory made heat shrink crimp connectors.
This pair is distributed by Ancor Products and are called the "Single Crimp Ratchet Tool" Part No. 702010.
I paid about $55.00 for this crimper at Hamilton Marine in Portland, Maine.
You can buy a nearly identical crimper, without the Ancor name, from Sailors Solutions for only $39.95.
Sailors Solutions Crimper (LINK)