backpack

A CNC Mill Backpack Drills Permanent Messages Into Solid Rock 

A CNC Mill Backpack Drills Permanent Messages Into Solid Rock 

Everyone wants to live forever. Or at the very least, leave something behind that will last. In some ways, that’s the most basic driving force behind graffiti: I was here. Paint washes away, but rock carvings, on the other hand, have a considerably longer half life.