There was an indication of how to install in the review of other people, but the bit mounting method is written as a push-in slide type, but what I bought was a tension slide type.
3pc bit holder which seems to be the same item with oval carabiner (example: order code 22564246) is written as tensile slide type. It may be a mistake, but please be careful as it is an important part at the time of selection.
Compared to other cheap holders, this product is very smooth and easy to insert / remove a bit. In other products the spring was too tight, I could not insert or remove with one hand, or the ball of the bearing was left to retract soon. Recent, the impact driver is mostly a pulling slide type, so the holder is also very easy to use with this formula.
I inserted the bit for impact and socket bit etc in this holder, put it from the waist belt and moved while moving inside the site. However, when I tried to raise from the ground floor to the roof at the scaffolding stairs, there was nothing that was suddenly inserted into the holder. It seems that the bit holder slipped out by touching something during the move. That's right. This product is a type that pulls the holder and inserts or removes hexagonal shaft accessories. Of course, I think that you are hanging on a belt hook or a waist belt with a carabiner etc. during work. However, pulling type is absolutely useless. As things you want to carry around frequently happen when you notice it, this product will not be used. There is no problem at all if it is a type used by pushing in another company's product which is slightly more expensive than this product. I highly recommend you there. Also, at least on the item page I would like you to specify clearly "type used by pushing" or "pulling type".