The Dillon .38 SuperComp SDB Caliber Conversion Kit is a box of the calibre-specific items required to convert your Dillon Square Deal B progressive reloading machine to be able to load .38 SuperComp and similar calibre ammunition. The unique SDB dies form part of this kit. Although the Square Deal B uses tungsten carbide sizing dies, we strongly recommend using case lube. Dillon's spray-on liube is easy to apply!