For when a head has already been improperly repaired, or for when the damage is beyond the help of the standard M14 Time-Sert kit, Big-Sert is the answer. This kit is the perfect compliment for our SR130BS and includes a wrench, reamer, tap, driver, setting tool, 1/8" hex key, 3/16" hex key, and sealer, all in a rugged plastic case. Inserts sold separately.