The 15/16-Inch thick Hitachi 728471 has a length of 18-Inch and includes a round shank helping your tool keep a tight grip while in use * Hitachi DuraCore treated products are manufactured utilizing a proprietary technologically superior to cryogenic treatment * Used for drilling and running wires through walls, ceilings and floors * Hitachi DuraCore products are proven to last longer and outperform the competition * Comes with a 30-day limited warranty