This Collet only works with either of the Forster Bullet Puller bodies.
The Standard Bullet Puller Body Die is for use with presses other than the Forster Co-Ax Press.
The Universal Bullet Puller Body Die is designed for use with the Forster Co-Ax Press.
The 0.452 and 0.358 bullet pullers are seratated to work with softer bullets like lead cast and swaged bullets.