J&T Tekno ET48 2.2 Titanium “Milled” Turnbuckle Set. These Turnbuckles have a 5.5mm Milled center that tapers down seamlessly for a timeless look that will elevate any vehicle’s appearance! Unlike most “Finned” designed turnbuckles on the market, these turnbuckles are beefed up with a 5.5mm center and manufactured from a higher GR5 titanium that will take a beating.