i tried using google photos but anyways that is 42" curved with 50" curved mounts for a 99-07 chevy silverado/1500 with a little bit of bending and some elbow grease they worked perfect

 

how do they mount to the cab, self tapping screws?

 

the mounts come with brass fittings that pop into the door jam and when the bolts get tightened down they expand tight

 

drill hole, insert, and screw in process?

 

Ya it was pretty easy the hard part was the bending the mounts to fit just right

 

awesome, thanks