TEKTON 2919 3-Inch Power Bit Set, 5-Piece Screwdriver Bits Feature a Heavy-duty Contractor Grade Construction that is Ideal for Contractors, Woodworkers and Serious DIYers Nickel Chrome Molybdenum Steel Construction with a Durable Sandblasted Finish Fits Universal 1/4-Inch Hex Shanks Set Includes: (2) Flat Bits: 3/16, 1/4-Inch; (2) Phillips Bits: #1, #2; (1) Drywall Bit: #2 Quality Guarantee