The T50 Genuine Arrow staples are made in the united states from quality stainless steel material, ensuring your stapling is precise, strong and long-lasting first time, every time. Available in 6mm (1/4 inch), 8mm (5/16 inch), 10mm (3/8 inch), 12mm (1/2 inch), 13mm (17/32 inch) and 14mm (9/16 inch) sizes with a flat crown width of 10mm. Also in stainless steel and monel materials.