This stainless steel upgrade kit for the Hario Skerton coffee grinder produces a better, more consistent course grind by centering and stabilizing the lower burr.  Installs with only a screwdriver in about 5 minutes. There is no need to remove the lower burr from the center shaft with this kit.  This manual grinder works great for finer grinds, but if you want to use a french press or some other brewing method that requires a consistent course grind, this upgrade kit is a must.  It greatly improves the consistency of courser grinds by keeping the conical bur centered, resulting in an even gap between the two burs. This even gap is what produces a very reliable and consistent grind. This upgrade kit is for the Hario Skerton coffee grinder. It will NOT fit the Hario Skerton Pro coffee grinder, which has a completely different design. MONEY BACK GUARANTEE!  If you aren't completely satisfied, you can return it within 14 days for a full refund.