TEKTON 29431 Quick-Change Power Drill Bit Set, 20-Piece All-in-one power drilling system includes one-touch, quick-change bit chuck ^ Carbide-tipped steel masonry drill bits power through concrete, brick and block ^ Industrial high speed steel drill bits penetrate metal, wood, plastic and fiberglass ^ High-carbon steel spade bits cut quickly and cleanly through wood ^ Quality Guarantee All-in-One Power Drilling System Includes One-Touch, Quick-Change Bit Chuck Carbide-Tipped Steel Masonry Drill Bits Power Through Concrete, Brick and Block Industrial High Speed Steel Drill Bits Penetrate Metal, Wood, Plastic and Fiberglass High-Carbon Steel Spade Bits Cut Quickly and Cleanly Through Wood Quality Guarantee