This Dewalt Model has a spline shank chuck. To use the accessories that are shown ie; sds plus bits, calls for an adapter that changes from spline to sds plus. This adapter does not come with hammer drill and must be purchased separately. Anyone buying the sds plus bits as shown will be quite upset when they can't use them right away. There are a number of adapters available: spline to max, & spline to a 1/4-20 threaded end to accept a hammer drill chuck for round type shanks. With these as part of the total kit, you have a very good hammer drill. You have a very good hammer drill if you choose to use only spline shank bits, also.