The Lee Precision 90700 Auto Bench Prime is a reliable single-stage priming tool designed for ambidextrous operation and bench mounting convenience.Lee Precision 90700 Auto Bench PrimeAmbidextrous design - works for right or left-handed usersSingle-stage operation for precise primer seatingScrew mount system for secure bench installationDurable steel and polyester constructionSingle hole design for streamlined operationIdeal for reloaders seeking consistent efficient primer seating with the reliability and quality that Lee Precision is known for in the reloading community.