The SubSurface Instruments Magnetic Locator ML-1, can be used to find iron and steel targets.
ML-1 is a non-metered device (audio only). This instrument is engineered to operate identically with the same controls as the ML-1M but without the visual meter.
Features:
Easy one-hand operation
Easy keypad switches, no knobs
Lightweight - only two pounds (including batteries)
Uses two regular alkaline 9-volt batteries
Strong monotube construction provides structural integrity
Microprocessor retains volume and gain settings from last use
Soft pack and Hard Carrying case included
Limited Life-Time Warranty