Eagle Tool RB 312 Sheet Metal Installation Tool, For Drilling and Driving 5/16-Inch Head Sheet Metal Screws, Made in the USA Sheet metal installation tool for drilling and driving 5/16-inches head sheet metal screws One piece drill and drive tool with a 1/4-inch quick change shank Made in USA Retractable 1/8-inches heavy duty high speed drill bit. No loose sockets. Use drill and set screw replacement kit number RA125