That's the entire knuckle, and not very good pictures to determine how they are.
I'd want to see the pads and dust boots- If the dust boots are cracked and burnt, they've likely lived a hard life, with possible track use. If the pads are worn unevenly, the calipers likely need a rebuild.
Ask for pictures of the pads and pistons and you'll get a better idea of how they are.
Also...why the whole knuckle attached? That's a little weird....
2002 C5 Z51. MCS 2WNR TT2 coilovers, 18x11 Forgestars, 315's, yada yada. Built Z06 T56. Bolt ons. Coming soon to a CAM event near you.
2013 F150 6.2L. 9mpg.