The Arden's Photo Inc M42-Pentax K/M Lens Adapter Screw Mount is a high-quality adapter designed for Pentax K series cameras. Made in Japan, this screw-in lens adapter allows for compatibility with M42 lenses, providing a secure and mount adapter for seamless integration. The package includes one unit, catering to photographers looking to expand their lens options with ease. Whether you are a professional photographer or a Pentax enthusiast, this lens adapter is a valuable addition to your gear.