Single-fluted design eliminates skidding and makes for easier resharpening. Laser-etched hole sizes are easy-to-read and permanent. Anti-skid tip eliminates the need for center punching or pilot hole drilling for most sizes. Drill multiple-size holes in thin sections of metal, plastic, and wood using a single bit. Works in most metals (steel, brass, aluminum, copper), as well as in plastic and wood. Note: Read and follow safety instructions in power tool owner's manual.