This full lock cylinder set is made of durable stainless steel and includes 5 pieces, including keys. It is compatible with 2009-2014 Hyundai Sonata and 2011-2015 Sonata Hybrid models and can be easily installed on the rear, left, and front of the vehicle. The set features a matte finish and comes from a manufacturer in China. It is an OE/OEM part with part numbers 812503SA00 and 819703SA00, and is designed to provide secure locking without compromising the performance of the vehicle.