Lee 44SP44M Carbide Full Length Sizing Die only. Fits the following calibers: 44 Special, 44 Mag, and 44 Russian. All Lee straight walled pistol dies have tungsten carbide sizer rings. Carbide is so hard that it can only be ground and polished with diamond wheels.This hard diamond polished surface eliminates the need for case lubrication – they will never wear out. Exclusive contour grind sizes closer to the rim than any other brand. The collet held decapper is nearly unbreakable even if you misadjust it or deprime crimped primer military cases. The decapper clamp collet accurately centers the decapper in the die. Should you over stress it for any reason, it harmlessly slides up without breaking. Easily reset with no limit to the amount of times it can be reset.