DRILLPRO 5 pcs HSS Spiral Grooved Multiple Hole 50 Sizes Step Drill Bit Set with Aluminum Case<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>50 STEPS: No matter which size hole you want， it can always drill a perfect hole for you.</li><li>SHANK: Hexagon shaped shanks are better for boring through harder materials and have less slippage.</li><li>MATERIAL: Coated with aluminum nitride for proven capability and durability in drilling holes in plastic， copper， stainless steel and many other types of sheet metal so that they power their way through.</li><li>EASY DRILLING: SPIRAL design provides faster， smoother cutting.Provided with small pressure and the sets can cut through wood， sheet metal， steel and other surfaces</li><li>USAGE: For Sheet Metal Work， Countersinks， Auto repair projects etc， which are best used on thin materials. You deserve to have it.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51nvX9o3QpL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51VjodMTwyL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51sqEFKyiTL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41jCasZi-DL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41UoAiLIQ7L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/512IRkEiRVL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41qzsjYDtSL.jpg" noproxy>