Corrosion-resistant anodised finish. Extra bright, extra long life bulbs. Convert to lantern style lamp. Spot to flood adjustable. Non-slip knurled grip. Aircraft grade aluminium. Waterproof and shockproof. Twist action on-off control.
It does thisbyfittingsmallpiezoelectric acoustic sensorstopartsofthestructure to detect the particularfrequency of noisecausedby a crack in aircraft-grade aluminium.