Introduced in 1954 and nearly a perfect part until 2017 (see my rant that follows...) The same style of steel tremolo spring claw used on Fender USA Vintage Series Strats but they're now shipping 'em in zinc plate instead of nickel so you can't really solder 'em like the old ones. You can still solder your bridge ground wire to one of the two the nickel plated mounting screws or even the nickel plated tremolo springs. Mounting screws included. Photo may not reflect current Fender packaging.