The Frankford Arsenal Case Neck Lubricator is the perfect tool for reloaders looking for a way to lubricate case necks before sizing. After the body of the case has been lubricated, simply dip the case mouth in the mica, run it over the brush and it is ready for the sizing die. Mica when used to lubricate the case mouth is faster and more convenient than using a liquid lubricant. The 3-3/4" x 2-1/2" x 2-1/2" (L x W x H) base has two screws to mount the base next to the reloading press for easy access and also features molded-in nuts to hold the proper brush while it is being used, a reservoir to hold the mica and holes to hold the rest of the brushes when not being used.