A cikin mahallin masana'antar jigilar kayayyaki, GL yana ba da sarƙoƙi iri-iri bisa ga ka'idodin DIN 8165 da DIN 8167, da kuma samfura a cikin inci waɗanda aka ƙera zuwa ƙa'idodin Biritaniya, da nau'ikan nau'ikan nau'ikan daban-daban na musamman. Yawanci ana amfani da sarƙoƙin bushewa don ayyukan isar da nisa a ƙasa kaɗan