1/4 OTC Gland Wrench replacement pins are wrong diameter. They are closer to the larger 9/32 and will not fit the 1/4 hole. This is an ongoing problem, dating back at least to 2016. OTC pens are either incorrectly machined or incorrectly labeled. read reviews. This also applies to the advertised 1/4-5/16 pins that come with the OTC key. Good luck with the customer service, I think they are mishandled or mislabeled as well.