Bit holder and extensions. Geometric design provides the shock absorption for extreme durability and long life. Proprietary steel and heat treated process for maximum strength. Bit holder's 2 piece construction withstands abuse in impact applications. Forged tip for maximum grip. Bit tip holder 2.36" included. For use with impact duty insert magnetic nut drivers ( 1/4", 5/16", 3/8", 7/16" and 1/2"). Bit holder type: Standard with C-Ring.