This blade serves as a heavy-duty version of the smaller FI-13s-B. The longer cutting edge, bigger tooth, and thicker blade-body make this blade perfect for larger cuts. (This blade also serves as a replacement blade for the FI-1700 hand saw.)
The Ultra O’s symmetrical rope baskets are ideal for assisted breaking devices, pulleys, swivels and shackles. They also give stable loading characteristics, as attachments can self-centre under load with minimal movement from the carabiner.