DM Group Of Industries Door Lock | Material- Mild Steel | Size-125mm | Function- Indoor & Outdoor 3 Keys Profile - Ky Heavy main door lock. ---IDEAL FOR- Wooden & Iron Doors. A Premium & Architectural range of Builder�s Hardware are designed to give an exclusive and royal look to your dream homes. The dazzling, sparkling and mesmerizing range has been designed to blend with the modern exterior and interior, at the same time enhancing the beauty of its environs. Every piece goes through stringent quality control measures to assure consistent production standards from one batch to another. Quality product at reasonable prices is the sure motto of our company.