Bosch HC8021 2-5/8 In. x 12 In. Spline Rotary Hammer Core Bit with Wave Design<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Wave design transfers energy to bit more effectively for up to 40 percent faster drilling versus previous design</li><li>7 In. usable length， maximum core depth of 2-5/8 In.</li><li>Integral shank for better power transmission</li><li>For masonry/concrete drilling</li><li>One-piece design</li></ul></div><img src="http://ecx.images-amazon.com/images/I/315gK7RkA6L.jpg" noproxy>