Always be carefull opening up any plastic cases for the coins. Not to much for the possibilities of damaging a coin, but for your eyes. You can always get a new coin but not to easy to replace your eyes.
People that recommend bolt cutters, side cutters, pliers, etc. seldom mention the use of safety glasses. Flying peices of plastic with sharp edges can do a real job on your face and eyes.
Many use a Dremel type tool to cut off the edges but even then safety glasses should ALWAYS be recommended.