How I Pin Lee Commercial mold handles
1) Build a jig that snugly holds the handles
2) center the jig on a 1/8 " drill bit in my drill press
3)drill the hole (s) 99% of the way through
4) drive in 1/8" x 3/4" roll pins and set flush with a punch
touch up any rough edges with a fine file, sandpaper or?
1/8" x 3/4" roll pins $4 per hundred at local fastener store (or Fastenal) [online, small quantity prices will scare you!!!!!)
Some people have success epoxying them in