DYNAMIC 7-Inch Battery Operated Engraver Pen :TJ9907 This engraver pen includes 4 different diamond coated tips - 2 sizes in round and 2 sized pointed Pen is 7 inches long from base to end of tip - push button operation This pen is easy to use - just hold it like any other pen and hold the button down to engrave Use this pen to engrave your name on your property - use to personalize a gift Remember to hold pen at angle, apply light pressure - needs 2 "AA" batteries (not inclu.)