>>1547741Both, just a PAS is used for both. Sling is adjustable using knots or clove hitches. Anchor is redundant by connecting the bolts with a quickdraw if they aren't already connected with a chain (most are where I climb). Clip to one bolt, partner clips to the other. Then rig the rappel line.
Pic related, imagine thumb loops are bolt hangers and biners are rap rings