I bought it in order to carry out all necessary holes in building a kitchen can. The combination of the set is well chosen: The sockets can be just like the drain, the faucet and supply lines for the angle valves drill. The bits making first a solid impression. The mounting of drill bits to the holder acts thoughtfully, but could be improved in details. The 35mm drill bit (40mm deep) not to be used for 40mm worktops. The Bohrkronenhalter is slightly larger in diameter than the drill bit skewed by the fact in the bore and is very difficult to free. In addition, the 68mm drill bit to 6 holes in OSB is blunt.
Conclusion: For other applications as OSB panels and 35mm holes still a useful tool.
