A new Carboloy CAT 40 fly cutter with 15 inserts is offered for sale. The cutter takes a single insert and is unused. There is no pull stud included. The thread on the holder for the stud is 16mm with 2 mm pitch. CAT 40 holders can have metric threads. There are 10 CNMG543K inserts and 5 CNMG544P inserts. The cutter is in the original box.