Since 1995 Kolmair has been manufacturing door lock at its own factories in shanghai where the entire production process takes place.

Starting with zinc die casting billets, the handles are forged, milled,polished, buffed, chrome-plated and hallmarked with a laser.Kolmair has attained ISO 9001 and ISO 14001 certifications.

Though it uses the most advanced technology,Kolmair preserves all the artisanal wisdom it has accumulated in 22 years of history.

KOLMAIR has been adhering to the "quality first, reputation first" business purposes, for the majority of users provide first-class products and quality services.