There is no need to disconnect one hand piece to use another hand piece. The hand piece is selected by turning the silver handle on the top left, rear of the unit.It has been modified by adding a throttling valve (large black knob to the right of the pressure gage). The valve allows the machine to be "tuned" way down for very gentle impacts, which is great for bulino work. Set it at high for quick removal of metal. It can also be used with a larger hand piece to make heavy impacts.
The impact speed is adjustable. The unit was checked out and it worked. The engraving equipment belonged to an older gentleman, who is no longer able to engrave. The equipment has been sitting, unused, for about 20 years.
The item "GRS GRAVERMAX ENGRAVING EQUIPMENT KNIVES FIREARMS JEWELRY" is in sale since Tuesday, January 1, 2019. This item is in the category "Jewelry & Watches\Jewelry Design & Repair\Jewelry Tools\Engraving Tools". The seller is "ebainfool" and is located in Buena Park, California. This item can be shipped to United States.