Swingline Durable Full Strip Desk Stapler, 20-Sheet Capacity, BlackAll-metal base for durability and stability. Contoured and finished for comfort and flexibility. Tie plate for long-term consistent performance. Uses S.F. 4 Premium Staples. Stapler Type: Full Strip; Staple Capacity: Full Strip (210 Staples); Size of Staple Used: 1/4"; Type of Staple Used: S.F. 4 Premium Staples.