Double vinyl-coated steel "S" hooks provide a secure hold without scratches.Steel ratchet action lever easily tightens locks, and release automatically.Trouble-free, pushbutton quick-release.Double straps will not loosen with road vibration. ⚠ WARNING: This product can expose you to LEAD, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.