The Rodman Blue Bullet Drill Bit will make holes in the most rigid steel, chrome vanadium, Grade 8 bolts, broken taps & easy outs, stainless and spring steel — even Inconel & AR500*. It performs well on brick, block, granite, tile, and most other masonry products. At last, one single bit will do ALL jobs! ✅ For ALL drills 800 RPMs and higher ✅ Maximizes the life of drill bits ✅ Resharpens cutting tools, gardening tools, etc. ✅ Drill through a variety of materials — granite, hardened steel, concr