The Pentax Extension Tube Set is a high-quality accessory designed for use with screw mount lenses. Made by the trusted brand Pentax, these extension tubes allow for closer focusing on subjects for macro photography. With a twist-on fastening mechanism, they are easy to attach and remove. Crafted in Japan, this set comes with a convenient case for storage and transport, making it a practical and reliable option for photographers looking to explore the world of macro photography.