Why is the Ezy Lift so safe and your previous chain system not?

The Ezy Lift Hydraulic System is a product reflecting today's advanced technology and keeping up with world standards. As a result today's product safety is unsurpassed. The Chain system is yesterday's technology - the chain is only as strong as its weakest link - plus the pole and ratchet cannot maintain optimum safety with continuous use.

This Q&A was found on Ezylift : http://ezylift.com.au/modules/smartfaq/faq.php?faqid=27