With the Facom 285.J10 stud extractor set, you can remove broken or seized studs and bolts without damaging the surrounding internal threads. Covering a diameter range from 3 to 18 mm, it is ideal for demanding extraction jobs on engine blocks, machinery, and industrial equipment. The set includes 5 right-hand pitch extractors and 5 matching tapered drill bits for precise central pre-drilling. The included 831.1 tap wrench fits the 4 smallest extractors, giving you optimal leverage and control during extraction. Everything stays securely organized and protected in the durable BP.102 plastic case with PL.464 tray, ready for immediate action in your workshop.