The Lee Factory Crimp Die crimps the bullet firmly in place. It features a collet that squeezes the case mouth into the crimping groove for a firm hold. It is nearly impossible to buckle the case as with regular roll crimp dies. Shell holder sold separately. The Lee Factory Crimp Die is made of steel and comes packaged in a plastic storage box.

Specifications and features:
.257 Roberts Factory Crimp die
Crimps bullet in place more firmly than any other tool
Impossible to buckle case
Trim length is not critical
Bullets without cannelure shoot more accurately with the factory crimp die