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. Lee Carbide Dies are used in commercial loading machines that cycle four to five thousand times per hour. You can't wear them out with personal use. These are the most copied dies ever invented. The competition tries to copy our dies, but come up short. Only Lee puts it all together to make the best pistol dies money can buy. Reloaders buy Lee Dies because they are the best made and have the most features. Lee 9MM Luger Carbide Full Length Sizing Die only. No case lube required. Features: Carbide sizing die - simply the best way to resize straight walled handgun cartridges