These 1-1/4 in x 9/16 in 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.