Milwaukee 48-89-9105 1/4-Inch to 3/4-Inch 3/8-Inch Shank Step Drill Bit Delivers high performance in heavy-duty applications All-metal ratcheting keyless chuck for greater bit retention Soft grip handle design offers increased gripping surface and comfort 3/8 in. shank 9 hole sizes, 1/4 to 3/4 in. Self starting multi-hole bit Good choice for medium size holes