From the Manufacturer
The Hitachi 725787 Spline 12-1/2-Inch Rotary Hammer Adapter Shank Extension is part of the power reach extension line at Hitachi. The extension line system is for drilling 1-3/16-inch or larger holes in concrete, masonry and natural stone. The two spline chucks provide a quick and safe connection between the drilling tool and the extension shanks. The Hitachi SDS (slotted drive system) Max is a high performer when drilling through reinforced concrete. There is no energy loss normally encountered in traditional adapter systems. There are no weak points making breakages through excessive strain difficult. Suitable with SDS-Plus, Spline and SDS-Max rotary hammers. Use with spline rotary hammer bits that are 1-3/16-inch and larger. The adapter measures 12-1/2-inches in length. The Hitachi 725787 Spline 12-1/2-Inch Rotary Hammer Adapter Shank Extension is warranted to the original purchaser to be free from defect in materials and workmanship for a period of 30-days from the original purchase date. Every Hitachi accessory is designed to the highest standards and is rigorously tested for both performance and durability. Since its inception, Hitachi has pioneered innovative technologies that have improved the quality of craftsmanship worldwide. Hitachi is a leader in power tool research and development and has achieved many firsts in the power tool industry. Today, Hitachi continues the tradition of innovation and engineering with new features in addition to classic quality.
Hitachi 725787 Spline 12-1/2-Inch Rotary Hammer Shank Extension Adapter