I slapped myself around always with cheap drills. The Bosch GSB 16 may cost twice of no-name products, but you can tell the difference from the many details: The metal drill is easy to tighten, and the opening by hand goes completely smoothly and without great effort. The barrel is round and without eggs. Links the vacuum cleaner pipe in his hand, right the drill - drill into concrete or masonry is compared to cheap products easier than ever. Only the additional bracket for 2-handed operation is to screw a little shaky. But when the bracket is tightened again, then she goes down no longer easy.