Astro Tools 78311 11 Piece 3/8" Drive 1/2 Size Socket Set 9.5 19.5mm for Undersized, Swollen or Damaged Hardware

Ever grab a 13mm socket and it's too tight to fit, but 14mm feels lose? And it's not SAE? Not every bolt and nut on vehicles remain factory perfect to the millimeter over time and service life Use 0.5mm under sockets for rounded and damaged bolts and nuts, use 0.5mm over for swollen or corroded bolts and cap covered nuts For hand tools and impact wrenches, use a hammer to fit 1/2 size under sockets where needed Also works on SAE fasteners by stepping down the effective hex dimension on worn out hardware