A TRUE mini-spool for the Suzki Samurai model SJ413 AND the Suzuki Sidekick / X90 orGeo Tracker! The spool is an extremely strong and economical method of achieving 100% lock up of the rear differential without the quirkiness associated with automatic lockers. Dont be fooled by cheap China made knock -offs. OUR spool is manufactured from 4130 CHROME MOLY and is heat treated for superior strength. MADE IN USA. If it is not engraved with “Trail Tough” on the top, it is not our spool!!