DeWalt Impact Ready Cleanable Nut Drivers enhance the overall life of a nut driver by allowing users to detach the nut driver from the shank to clean off debris (ie. metal shavings) that accumulates from use. Recessed corners drives on flats which minimizes shavings. Robust magnetism provides fastener retention for greater ease of use in all hex-head fastening applications. Designed for use in impact drivers and wrenches.