A pachinko machine resembles a vertical pinball machine but is different from Western pinball in several ways. First, a pachinko machine uses small (11 mm diameter) steel balls, which are rented to the player by the owner (usually a "pachinko parlor," featuring many individual games in rows), while pinball games use a larger, captive ball. The pachinko balls are not only the active object but also the bet and the prize. The player loads one or more balls into the machine, then presses and releases a spring-loaded handle, which is attached to a padded hammer inside the machine, thus launching the ball into a metal track. The track guides the ball around the edge of the playing field, then when the ball loses momentum, it falls into the playing field from near the top. Some pachinko machines have a bumper to bounce the ball as it reaches the top, while other machines allow the ball to travel all the way around the field, to fall on the second time that it reaches the top.