Extang Trifecta ALX - 99-16 F250/350 6'9" Model 90720Extang Trifecta ALX 99 16 F250 350 6'9" Model 90720 The easiest truck bed cover just got easier. The Trifecta ALX packs the same great features as Extang?? s best selling tri fold cover, the Trifecta 2. 0, but with a Secure Rotary Release Latching System at the tailgate and an automatic latching feature that?? ll make getting the goods in and out of your truck bed that much faster. Auto latching component automatically secures cover into place when