Had to get this 4 bit to make some 13/16 hole in plastic.I`ve had my 502 Unibit 3 pc. set -- bit numbers -- 1, 2 3 -- for over 20 years, (when it was made by American Tool Companies, Inc. ).I use my Unibit`s occasionally for holes in sheet metal and thin plastics. They always produce a smooth round hole.
Rating: [5 of 5 Stars!]