I use this bit holder and another of CON: P along with my cordless screwdrivers from Bosch (blue) the GSR 10.8V, 10.8V GSB and the GDX 18V and have never had any bad experiences to date. The black sleeve does not rotate with it but is suitable for touching and guiding the shaft is not flexible but rigid and Bitverschluss is a quick release for the quick change of the bits. I am pleasantly surprised by these two bit holders or extensions and it would now no longer miss. For normal glands hard to reach places, the two (300 mm & 450 mm) are simply no longer possible to imagine and I'm me buy more definitely come back, if they should get broken again because at that price it's a real bargain, This was around ~ 15 for both and I would really call a moderate price, hence a clear recommendation by me, so you can not go wrong.
