WORKPRO 3-Piece Step Drill Bit Set, 1/4" Hex Shank Quick Change High Speed Steel Titanium Coated Drill Bits for Plastic, Wood, Sheet Metal, Aluminum Hole Drilling, Well-Organized Bag Included,Metric

WORKPRO 3-Piece Step Drill Bit Set, 1/4" Hex Shank Quick Change High Speed Steel Titanium Coated Drill Bits for Plastic, Sheet Metal, Aluminum Hole Drilling, Well-Organized Bag Included,Metric

DEWALT Drill Bit Set, 14-Piece, 135 Degree Split Point, For Plastic, Wood and Metal (DWA1184)

NEIKO 10181A Step Drill Bit Set, 3 Piece, Spiral Grooved for Faster Drilling, Step Bits for Stainless Steel, Metal, Wood, Plastic, Unibit Cone Drill Bits with 31 Step Sizes Total