This is another roller bearing key, hopefully improved by lessons learnt with the previous key, this time the main arm of the key sits on a large machined axle with bearing plates holding the rollers, as this lifts the key quite high the  latest  adjusters are working on two alloy bars that will have the contacts and connectors fitted, the adjusters are standard fore and aft, the wide stable base of the key loans itself well to a magnetic tensioner, the magnets of which are the latest NeoNeodymium type working in attraction mode which is considered the best owing to the decrease in tension on gap opening, its a nice key, hard and machine like in operation.