7 Piece, Tapcon Installation Drill/Drive Bit Set, Set Includes: 5/32" x 5" Drill Bit, 3/16" x 5" Drill Bit, Install Sleeve, 1/4" Nut Driver, 5/16" Nut Driver, #2 Phillip 2" Power Bit & #3 Phillips 2" Power Bit, Built-In Hex Collar Serves As A Stop Feature For Drilling The Perfect Hole Depth For Tapcon Screws & Other Concrete Screws, Drill/Drive Installation Sleeve Slides Over Bit & Engages With Hex Collar To Quickly Drive Hex Or Phillips Head Fasteners, 1 Piece Construction Withstands Higher Torque Loads Than Standard Quick-Change Bits, 1/4" Quick-Change Shank Is Designed To Work With Impact Drivers & Reduces Slipping In Standard Drill Chucks.