Paul, John. "Car Doctor - Heavy Key Ring Could Be Culprit in Malfunctioning Brake Light." The Providence Journal. 27 October 2007 (p. C11). Tallant, Nicola. "More Keys Than a Mountjoy Warder." The ...

GM Issues Words Of Caution Over Heavy Key Chains. March 13, 2014 / 9:41 PM EDT ... that doesn't do the lock cylinder any good with all that weight hanging on there," says Bob Bastone, of Bastone's ...