In a message dated 98-02-11 21:39:51 EST, you write: << I have found that a glue gun worked great for me. Just heat it up and apply it to the area you want the hole. You may need to apply pressure depending how tough the plastic is. >> I do not like the smell of melting plasic-- so i figuer thats the reson they made them nice titanium drill bits!!!! Boy do they work good-I can put 5 -30 plastice trays in stack and cut right through them.