The drills are made clean, main and cross-cutting are sharp and honed at the right angle (118 degrees), the concentricity is optimal and the side rake angle (twist) for removing the ablated material does the job quickly without "clogging".
I use them in conjunction with a hand drill ("The Army Painter") mainly to wood and am completely satisfied, only the storage box could also be provided at the front with a plexiglass window in order specifically to better protect the very thin drill.
It should also be noted that as the 0,3er drill works very well (which you can, for example, super for drilling of nozzles on the calcified shower head ;-) use, the shaft could also be a little longer in this like in order to facilitate clamping.
Top product at a low price.