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I used it once and the drill bit turned loose after 10 seconds. plain and simple. Makita is overrated garbage. This is after one usage. This product sucks. then I tried to reinsert, but after opening it up it got stuck on open and would not close any more. Stick with quality. at the store they said the spring probably broke.
I wound up destroying the chuck to retrieve my drill bit. I used it once to drill a 3/8 inch hole in wood. Great idea but has limitations. The drill went into impact mode when it encoutered hard wood and locked the drill bit into the chuck. I would only recommend using this tool for small hole drilling in which case buying a set of drills with the hex shank is cheaper than buying the chuck adapter. I was unable to remove the drill bit since the chuck had frozen in the locked position.
This chuck allows you to use regular drill bits in impact drivers with 1/4" hex drives. (Tool belt space is valuable). It works great and is a much better keyless chuck than the ones Dewalt puts on their drills, for instance. It could be a little smaller for the actual capacity it has.
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