a universal drain tool for use with shower and sink drains is provided . a representative drain tool includes a head containing a shaped aperture configured to engage the lock nuts of common shower and sink drains . the tool includes a handle attached to a head part . the handle allows the user to rotate the head part when the head part is engaged with the shower or sink drain . the head part can include an edge piece configured to insert into the internal lock nut slots of commonly available drop - in shower drains .