Haven't used them yet just based on looks. As always good stuff from Bosch. I have to point out some disadvantages of the packaging. It is marked as "reusable packaging". Like Bosch, HOW? It's basically standard clamshell packaging that needs to be ripped open and cursed by the packaging gods to open. Now my bleeding fingers and I are trying to return the parts and seal what's left of the packaging. Maybe it can be reused after many tape applications. Then it says "shockproof" on the front but the warning on the back says not to use with punch, jackhammer etc. Bosch REALLY again? Now I'm confused. Is it an impact? Isn't that an influence?