What size core bits are recommended for use in the DEWALT Spline and SDS Max Hammerdrills? Support November 13, 2020 21:07 Updated Follow Refer to the chart below for the recommended core bit sizes. Related articles What is the warranty on my drill? What nails do I use with my DEWALT nailer? What is the shank size on the SDS Max and Spline bits and accessories? Comments 0 comments Please sign in to leave a comment.