
This is a good set of SDS bits. They fit my drill perfectly and did a good job on a variety of jobs including penetrating cinder blocks and other concrete. Since there are chillies in this set, make sure your SDS tool supports no-spin hammering. I haven't had any problems with these bits breaking or chipping, although I don't use them for heavy work - mostly just around the house and yard. The case is okay - it's thin plastic, but at least thick enough to hold bits without worrying about them being punctured. It doesn't screw all the way on, but has lugs that hold it in place so you can adjust the height. However, the deal is good enough.