These hinges are made using a "hot-forge" process which makes the brass 1 1/2 times stronger than casting! This process also leaves a more smooth and fine surface for finishing that casting cannot equal, and allows for finer machining for springs and pins. Features include a premium quality solid brass hinge body and stainless steel spring for strength and durability (no rusting!). The spring is fully finished to match the hinge body and each hinge is hand polished to ensure an even surface. Two sets of premium grade wood screws are included-phillips flat head and slotted flat head-and are coated and/or plated to match the hinge finish.