The Benchmade 10 BLK Rescue Hook Safety Cutter w/ Black Molded Sheath. The Benchmade 10 BLK Rescue Hook is a versatile tool originally designed for corrections officers. Its large hook gap makes quick work of cutting through rope and other woven materials up to 1-inch in diameter. This Rescue Hook includes a multi-position, reversible Boltaron sheath with a snap retention strap for secure carry. Skeletonized 440C stainless steel construction. Enlarged finger hole offers maximum grip security during use. Reversible sheath allows ambidextrous carry in vertical or horizontal positions.