Arrow Fastener 506SS1 Genuine T50 Stainless Steel 3/8-Inch Staples, 1,000-Pack Genuine T50 staples are for use in Arrow, Powershot, Craftsman, Black and Decker, Stanley, Ace and other narrow crown heavy-duty staple guns Stainless steel Made in the USA 3/8-inch leg length, 3/8-inch crown size 1,000 per box