Do you have instruction on how the attach the DWASHRIR to an impact driver? Support November 17, 2020 13:49 Updated Follow To attach the DWASHRIR to a 1/4 hex impact driver please see below: Related articles What is the maximum size socket that can be used on our impact wrenches? What model impact drivers will the DWASHRIR work with? Why is the product registration site not working for me? Fastening torque for the DEWALT® DCF894 is listed at 330 ft lbs, what is the breakaway torque? Can I use my impact driver as a drill? Comments 0 comments Please sign in to leave a comment.