Metal mechanism, plastic arm, and a very durable base. Easy to use – simply press with your finger to remove the sheets. Features a metal device for easy removal of staples. Front automatically retractable staple container. It staples up to 16 sheets. Sheet insertion depth: 29 mm. Cufflinks: 10, capacity: 50 cufflinks. The innovative mechanism requires 60% less effort than a classic stapler. 10-year warranty.