RCBS Dry Case Neck Lube is a specially developed from of mica and is used to lubricate case necks. To apply, simply dip the case neck into the dry lubricant. Tap the case to remove any excess lubricant. Manufactures Website Address www.rcbs.com Warranty Information If any of your RCBS equipment breaks or doesn't work, they will fix it or replace it. No time limit. No questions asked.