The DEWALT's DWPVTDRV 4-piece impact ready magnetic nut driver set includes 1/4 in, 5/16 in, 3/8 in, and 7/16 in. The nut drivers features a patented geometry that reduces the rounding of the hex and pivot up to 20 deg. to get into tight spaces and corners. Use the DeWALT's DWPVTDRV in a corded or cordless drill or an impact driver or wrench for ultimate performance.