Here are some images I made of metal stamping punches used in engineering presses. Here is a Perl script I wrote to generate povray files for different sized punches.
Punch with oval form, shank 20mm length 75mm form 16mm x 5mm, 15mm long. povray source
Punch with rectangular form, shank 13mm length 75mm form 10mm x 4mm, 15mm long. povray source
Punch with round point, shank 16mm length 65mm point diameter 12mm length 15mm. povray source