Abus 28410 additional window lock fts3003 b vs ek brown abus 28410 the abus 28410 additional window lock fts3003 b vs ek brown has been manufactured to a high standard courtesy of a sturdy steel bolt lock and an inner mechanism made from hardened steel an additional feature is the top quality 4 pin cylinder abus 28410 additional window lock fts3003 b vs ek brown