With the Dewalt DT4786-QZ spade bit, you drill deep holes quickly and effortlessly through thick structural timber. Thanks to its generous length of 406 mm, you can easily bore through heavy joists, beams, and stud walls without needing an extension rod. Featuring a 22 mm diameter and two cutting edges, this robust chrome-vanadium steel bit powers through softwood, hardwood, lumber, and even nail-embedded wood. The 1/4" hex shank guarantees a firm, slip-proof fit in your drill chuck or bit holder, providing the stability and control you need when installing plumbing or electrical pass-throughs.