Eagle Tool US installer bit measures 18 inches long and 1/2-inch diameter. Eagle Tool US offers an extensive line of hole making bits made for the professional electrician or low-voltage cable installer. This bit is manufactured in the USA of the highest quality us steel. Heat treated for longer life and cutting edge durability. Eagle installer bits have a split point for faster drilling and less walking. Clearances grind on the OD for fast chip removal and less binding and three flats on the shank for a better grip.