Systems and methods are provided for ranking document data retrieved from a data source in response to a search request. The grip member includes a housing body and an upper handle extended backward from the housing body. A spindle is sized to fit in each of the central apertures of the small and large pinion gears. By measuring the distance between a portion of the dummy feature and the midpoint between the reference features, the amount of recession of the dummy feature can be measured. The Ks2w region stores a session key.