Introducing the KIDD precision Ground guide rod kit, engineered for those who demand the utmost in performance and reliability. Crafted from hardened tool steel, this guide rod is precision ground to an exacting tolerance of 2/10,000 inches along its entire length, ensuring unparalleled consistency and stability. The rod undergoes a specialized nitride treatment, resulting in an impressive 70C Rockwell surface hardness - exceeding the hardness of a standard file. This treatment not only enhances durability but also guarantees the smoothest and slickest operation in the industry. The kit includes three meticulously calibrated springs, each offering a different tension to provide the ultimate in customization and performance tuning. Alongside the standard spring tension, we include a 10% lighter and a 10% heavier spring, allowing you to fine-tune your cycling to perfection. This flexibility ensures that your firearm operates at peak efficiency, tailored to your specific needs and preferences. For optimal results, we highly recommend pairing this kit with the KIDD bolt Handle. This combination eliminates the need to modify the factory bolt assembly, offering a seamless upgrade path that enhances both functionality and ease of use. Elevate your shooting experience with the KIDD precision Ground guide rod kit - where precision meets performance. Guide rod and spring for the 10/22 bolt handle assembly Designed for use with a KIDD bolt handle Interchangeable tuning springs