Tungsten carbide is more brittle than high speed steel, so you're going to have to take a little care with them; but with a Dremel tool you should be using a light touch and letting the speed do the work anyway, not forcing the bit into the work and trying to power through it. At 30,000rpm, Dremel's high-speed-steel bits rapidly overheat, dull, and eventually burn out. These tungsten-carbide bits just won't dull, as long as you don't physically break them and you don't try to do ridiculously excessive things like Dremel a life-size reproduction of Michelangelo's David in real Carrera marble Features Carbide rotary burr set processing all kinds of metal(burr bits for metal carbide burrs for steel including all sorts of hardened steel) and non-metal (such as marble, jade, bone). Machining hardness reach HRA85. For the most work rotary burr set can be replaced with small grinding wheel,and no dust pollution. High efficiency, high-quality finish, long service life, good economic returns. Easy to use, safe and reliable, can reduce labor intensity. Mechanical parts chamfering, rounding and groove processing. Dual Chamber is crossover lines, not easy to block the lines, more suitable for the object of relatively low density material.v 10 different types: Oval, inverted cone, pointed cone,ball nose cone,ball nose, pointed tree nose,flame,ball,cylinder with round head, cylinder with end cut. Uses: Cleaning trimming,veining and weld joint of casting, forging and weldment.v Finishing all kinds of metal molds. Impeller passage of finishing processing. A variety of mechanical parts chamfer,round and groove processing. Inner hole surface of machinery parts finishing. The process of various metal and nonmetal sculpture. Package Included: 10x Tungsten steel Solid Carbide Burrs and storage box
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