Bits are top, the bit holder "FLOP"

Property me two sets of buy and with a neighbor to build a woodshed. This partly 20 cm screws were processed without pre-drilling. Bits and Makitaschrauber have seen it all, but both bit holder died on the same day: the bits stuck only loosely in the mount, the slide mechanism (to release the bits) can be moved any more. Brought back to the hardware store the sets. Comments from the seller: "There were already two people who had the same problem" ... Conclusion: Good for amateur hobbyists, the bits are great, the box handy holder not for eternity ...