Sree Varsha Engineering Offers Sree Brand UPVC Casement Gear Lock. UPVC Casement Gear Locks, we offer, are coming to the aid of industries that are dedicated to fabricating or finishing casement doors and windows in an impeccable manner. We are enlisted with the chief Manufacturers, Exporters, and Suppliers of UPVC Casement Gear Locks from Tamil Nadu, India. We offer the gear locks in a range of sizes, which goes from 400 mm to 1800 mm. We are quite particular about quality and abide by international standards all along.