The present invention relates to a manually operated working tool such as an internal combustion operated setting tool for driving in fastening elements such as nails, bolts, pins into a magnetizable substrate, having an inductive metal detector assembly with at least one excitation coil arrangement and evaluation means. The process involves reacting HF and at least one halopropene of the formula CX3CCI\u2550CCIX to produce a product including both CF3CCI\u2550CF2 and CF3CHCICF3; reacting CF3CCI\u2550CF2 andor CF3CHCICF3 produced in with hydrogen to produce a product including CF3CH2CHF2 andor CF3CH2CF3; and recovering CF3CH2CHF2 andor CF3CH2CF3 from the product produced in. The invention also provides a large number of channels, which allows for actuators such as sirens, strobes and line seizing devices to be wireless in addition to sensors. The number of second plurality of time increments during which the footprint boundary overlaps the each of the discrete road surface coordinates is determined for each of the time increments of the simulation. A coil is formed on the coil winding portion by winding the conductor.