I use this drill for precise drilling of holes in 3mm Aluauslegern of Multikoptern in model. For this I use the Proxxon bench drill. In combination with these drill that works excellent manner and a lot better than with normal HSS drills. The Spite emigrate less and allows accurate gathering of markings. The holes are formed at the place where they belong.
The stability of these drills is surprisingly high. about 100 holes in aluminum has endured my 3mm drill. Unfortunately I have found these drills only in the set. On the other drills with tip are usually wood borers. Does anyone know the alternatives?