portable engraving machine 1.less maintance 2.low price 3.small for shipping 4.easy and simple to handle Portable jewellery metal engraving machine Machine control part is composed of 5 parts: the power switch ( POWER ), the machine start switch ( START ), the direction control keys ( arrow), pressure regulating switch (PRESSURE ), ring plane change-over switch ( R, F )Machine' name: DKM- ...