Hitachi 725780 SDS 1-3/16" x 7-1/2" Max Quick Change Rotary Drilling Adapter Has a 1-3/16-inch diameter and a total length of 7-1/2-inches Provides a quick and safe connection between extension shanks There is no energy loss normally encountered in traditional adapter systems Quick change design allows for fast and easy one-handed bit changes without re-chucking Comes with a 30-day limited warranty High Quality Carbon Hardened Steel High Tolerance milled shank provides perfect fit CNC Controlled manufacturing ensures 100% quality consistency