An immobilization device and method of restraining vehicles, persons and animals uses tendrils attached to various devices to engage the target. The locking stylus holder engages the stylus at a series of discrete positions during insertion of the stylus into the holder. The ultrasound-imaging system generates an operator-directed transmit-beam scan sequence in response to the imaging parameters and transmits a spatially modified transmit-beam scan sequence over a portion of the volume-scan range of the ultrasound-imaging system. The high-cleanliness steel has a total-Li content between 0.