#21 High Speed Steel Fractional Hole Enlarging Drill

features and benefits: single-flute cutting edge for greater control through steps , 3 flatted shank prevents slipping in drill chuck , patented single-flute cutting edge gives the user a true round hole every time , ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates , pilot hole required holes sizes: 13/16" - 1-3/8"; n