Aluminum Bead Holder. Special C-Lok™ shape fits nearly all passenger, light truck, agriculture and truck wheels without slipping off. Aluminum design is lightweight but very strong and is less likely to mar alloy wheels. Great for super singles and super wide wheels — fits both steel and aluminum wheels. Available as a cabled pair No. 31714 for difficult wheels.WARNING This product can expose you to chemicals including Lead, Nickel, Carbon Black, Chromium VI, and other Compounds which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.