【High Quality Material】This brass key rings is crafted from solid brass. It is sturdy, wear-resistant, corrosion-resistant, and rust-resistant, retaining its warm metallic luster even after long-term use—far surpassing the lifespan of ordinary alloy materials. 【Secure Screw Lock Design】The gold brass key rings features a built-in secure screw lock design, completely eliminating the hassle of traditional spring clips that easily pop open and cause keys to fall out accidentally.