Milwaukee Shockwave Impact Duty Alloy Steel Screw Driver Bit Set with Titanium Drill Bit Set (143 Piece) Sliding Window This traditional direct glazed door This traditional direct glazed door complements any home's architecture For use with wood and metal doors C clamp inspired design with tool free clamping reduces chance of surface damage Includes 2 adjustable bushings which accept both standard backsets and both common door thicknesses Alignment window and taller bushings to deliver accurate height placement and straight drilling though specific masonry bits should be used for concrete or brick applications Q: Are these bits suitable for heavy duty use