This battery powered, easy to use tool is ideal for engraving metal, glass, wood, ceramics, and more! Comfortable contoured grip allows for greater control Includes two round diamond-tip bits and an allen key Compact pen-like design Battery operated (2 AAA, not included) Hold the engraver as you would hold a pencil, with either your thumb or forefinger over the button. The button is very sensitive, so only a light touch is required to activate it. Touch the bit to the item to be engraved. TIP: Practice on inexpensive material to get a feel for it before attempting to engrave finished jewelry items.