Forster Electric Screwdriver Adaptor... Economical Power Conversion for the Original Forster Case Trimmer This handy little adaptor replaces the crank on your Forster Case Trimmer and converts it to a power trimmer with your electric screwdriver or power drill. This adaptor also fits the Forster Deburring Tool Base. With power, even large batch trimming and deburring jobs are quick and easy to complete. See more at our Forster Products Page.