The Redding Premium Handgun 3-Die Set mate a Titanium Carbide-sizing die, a newly designed expander die containing the unique Redding expander plug now coated in TiN, Titanium Nitride for added surface hardness, lubricity and durability. The TiN coating will also reduce brass build up on the expander as well, an important improvement for high volume reloaders. The Redding Expander contains a unique series of processes it provides as it travels into the case itself. First a radius on its base eases entry into the case mouth. Next a parallel expander section expands and true's the case internally to create a perfect bearing surface for the bullet as it is seated. This also a Mfg: Redding