1,000 round crown staples Great for wire up to 5/16 (8mm) diameter 3/8 (10mm) crown width 3/8 (10mm) staple leg length Fits Arrow T37 wire and cable stapler Size : 3/8 Inch Arrow 376 3/8 (10mm) Round Crown Staples are for use in your for Arrow T37 wire and cable stapler.