A sensor for obtaining fingerprint images comprising a row of sensing elements for obtaining a plurality of snapshots of a fingerprint as a finger passes the sensor and at least one reference grid, wherein comparisons made upon images obtained from the reference grid are used to control the rate at which snapshots are obtained by the row of sensing elements. The pin has an external grooved profile that is engaged by a locking element carried by the box of another riser joint. A size of the first opening portion is smaller than that of the semiconductor element, and the conductive paste comes into contact with both of the covering resin and the conductive pattern exposed from the first opening portion. Included in the message is the destination telephone number. In one embodiment, the unique information considered by the call processor is information indicator digits, which may indicate to the called party whether to accept the call before the voice portion of the call is initiated. The inventive wrench is easier to use than conventional spring-based wrenches as the force required to adjust the torque is minimal and independent of the torque value to which the wrench is adjusted.