DeWalt’s new Cobalt drill bits feature a patent pending web taper design and an optimized 135-degree split point that allows them to start on contact and penetrate tough materials quickly. For faster drilling and chip ejection, the Cobalt Drill Bits also feature a unique, heavy-duty flute design, which produces faster chip ejection. Links:
[1] http://media.lt01.net/4073/Shared/DeWalt/Cobalt%20Drilling%20Sku%20Listing.xls
[2] http://www.dewalt.com