For drilling holes in thin material such as steel, stainless steel, copper, aluminum, or plastic;3/8 Shank with 3 flats to prevent slippage;Step Sizes: 1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/8, 1-1/4, 1-3/8-inch;Double flute for easy control;Self-starting, no walking and center punch is not required

• Neiko Titanium Step Drill Bit - 1/4 to 1-3/8 in 1/8 Increments, 10 Steps

Neiko Titanium Step Drill Bit - 1/4 to 1-3/8 in 1/8 Increments, 10 StepsNeiko