Case Neck Dipper Kit uses a mica-based dry lubricant that helps alleviate expander ball drag to prevent case neck stretching and loss of material sizing. Simply clean the inside of the mouth with one of the included brushes that fit into the base of the dipper, then dip the case mouth into the lubricant and it’s ready for neck sizing. Kit contains plastic case with brush holders and lubricant reservoir, 3.1grams of Motor Mica dry lubricant, and 3 brushes (sizes for .22 to .27, .35 to .40, and .44/.45 caliber). Mfg: Lyman