7/16-14 OverSized BIG-SERT Kit cast iron Big or Small Block thread repair p/n 5761E also used in rocker stud repairs. Kit Includes: drill, counterbore, tap, tap guide, driver, 5 inserts .600 length & sealer. Extra BIG-SERT insert p/n 57611. For first time block repairs use kit p/n 0761D B00TG25CME