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Take a Phillips screwdriver and insert it into one of the three holes you would normally install the removal tool. Use one that it closest to the size of the hole. With a large vise grip or channel-lock pliers, clamp onto the outer ring of the chuck (where the teeth are) and clamp tightly. Holding the screwdriver, rotate the pliers to loosen the chuck and remove the bit.
Most new cordless drills don't have a key(keyless chuck). Put the drill in reverse and hold tight to the chuck barrel, pull trigger and the chuck will open. Opposite to close/tighten Best I can do with info provided
Drill a hole in the top of the phillips head screw with a 3/16 th's bit. Don't drill the head of the screw off, just drill deep enough for a torx bit to hold. Take a T-30 torx bit and tap in into the hole you have drilled. Then turn the screw clockwise and it should come out fairly easily.
If you are having trouble turning the chuck to remove the drill bit just wrap a cloth around it a couple of times and use a pair of adjustable channel lock pliers to give yourself a mechanical advantage. If you have loosened the chuck but can't remove the bit just clamp onto the bit with a pair of vise grips and tap them a few times with a hammer while a friend holds the drill for you.
without having the exact model number for this tool I have in the past removed the outer collar on the quick release holder. After that you take out the small steel ball and the bit would come out but If you can provide the model I will look at it and see and call a friend that is a Bosch Authorized Service and see what they do in this case.