Immortal modz smallest and lightest mod ever! the atom is a clip activated device ( yes this one will clip to you jeans) the clip is brass with copper contacts and a copper battery door. it has a delrin body that makes the mod really light in your hand or pocket. the atom locks by unscrewing the battery door half a turn. Ball Mill engraved clip, Viking logo cnc engraved on top of the mod, Viking name cnc engraved on the side of the mod all body's serialized. we hope you enjoy using the Viking mod by Immortal modz.