5pcs HSS Cobalt 50 Sizes Step Drill Bit Set with Aluminum Case</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Step drill allows to cut several holes with one drill without changine bit constantly.</li><li>Coated with cobalt， this step drill is more durable and better heat resistance</li><li>Two-flute design enables a faster， more stable and smoother cutting .</li><li>Compared with the common drill， this step drill can deburrs holes while drilling and 3-sided shank prevent slipping in drill chuck. Step drill， also called multifuctional drill， can cut straight-flute， spiral-flute， single-flute.</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/5127qWlzIqL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/5145fKBcbWL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41PnT3DQqNL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41BmGluZVdL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/4118nWA6h3L.jpg' noproxy></br>