Not Every Bolt and Nut On Not every bolt and nut on vehicles remain factory perfect to the millimeter over time and service life
Use 0 Use 0.5 mm under sockets for rounded and damaged bolts and nuts, use 0.5 mm over for swollen or corroded bolts and cap covered nuts
Application Compatibility For hand tools and impact wrenches, use a hammer to fit 1/2 size under sockets where needed