BIG-SERT OVERSIZED REPAIR for use when a helicoil has failed. M14x1.25 BIG-SERT kit does not include inserts order separate p/n 5141E Extended Version for Deep holes. Spark plug thread repair kit does NOT include inserts. Inserts for 3/4 reach washer seat plugs search insert B00IXQIQ9U. Insert for 3/8 reach washer seat spark plug search insert B00J372DVK, For Taper seat style used in Chevy search B00IXQS4QA.