These 1-1/4 inch x 9/16 inch graphite metallic steel staples are designed to secure 14/3, 12/3 and 10/3 NM cables. These strong steel staples feature burr free, sharper tips so the legs drive in straight without splitting wood and are engineered with recessed heads to protect cable jackets. Virtually oil-free for cleaner handling and manufactured to contractor preferred length. Designed to be driven into wood with a hammer.