The Arrow A504SS1 Stainless Steel Staples are compatible with the Arrow T50 Stapler. T50 staples are the world's best-selling heavy duty staples. Made to deliver exceptional holding power, these staples are used for all heavy duty stapling applications. This size 1/4" / 6mm staple is best used for paper, light fabric and thin plastic. Stainless Steel Size: 1/4" - 6mm Pack Size: 1000 Made in USA