Item Name: Drillco 500 Series 29 Piece Cobalt Steel Heavy-Duty Jobber Drill Bit Set, Bronze Finish, Round Shank, Spiral Flute, 135 Degrees Split Point, 1/16″ – 1/2″ in 1/64 increments Description: Drillco 29 piece heavy-duty jobber drill set. Heavy duty construction made to Type J aircraft specifications. Used for drilling holes in hard, tough materials such as stainless steel, titanium high temperature and high strength alloys. High red hardness of cobalt permits speeds 30 percent greater than HSS drills. Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys. Round shanks allow use with a wide variety of toolholding systems. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging. What’s in the Box? We do not accept PO Boxes, please provide a physical address. We cover the return cost only if you received a damaged item, wrong item sent by us, or missing parts. Important: do not send back without getting a label through us first. ? ATTENTION BRAND OWNERS [PLEASE READ]? Unauthorized item listed on our store? We apologize for any listing error made by our staff or coding error and understand how important it is to protect your brand. We respect your brand’s integrity and we will REMOVE any allegedly infringing products from our catalog quickly.