An arthritic-aiding pin-centering-and-guiding auditorily-snap-locking umbrella comprising: a canopy having tension-adjusting oval openings, a pole having a fixed hub and a movable hub, tension-adjusting rods, rod-locking screws respectively screwed through the tension-adjusting oval openings and into the tension-adjusting rod, three pulleys respectively screwed to the fixed hub and the movable hub, a pulley cord threaded on the three pulleys and attached to the movable hub, a cord hook, two gear cams attached to the movable hub, a cord blocker attached to the two gear cams, at least one pin opening drilled through the pole, an arthritic-aiding grip ring attached to the cord hook, a locking pin attached to the arthritic-aiding grip ring, a recess molded on the locking pin, at least one pin-centering-and-guiding plug and tube having built-in auditorily-snap-locking leaf springs and leaf-spring towers inserted into the pole and aligned with the at least one pin opening, and a tower-locking screw screwed between the leaf-spring towers for locking the plug inside the pole.