One pair of brake pads
metal pin not included
Breaking in the pads: Essential before starting your ride.
You should try braking quickly a few times on a dry, flat, obstacle-free surface. Three or four sets of 10 dry, intermittent stops are enough to break in your pads. Dry braking will wear down the pad a bit.
Release your brakes for a few dozen seconds between each set of stops in order to let them decrease in temperature before starting a new series of 10.
Be careful of glazing.
If the problem persists despite several short, dry stops, lightly rub your brake pads with sandpaper.