The Seachoice Replacement Blade works with the Seachoice #79901 Rope Cutting Gun (sold separately). Use to cut and seal synthetic lines in one swift motion. It prevents fresh rush cuts from fraying and is ideal for nylon, polyester, and propylene cordage. Includes 1 Replacement Blade. Seachoice is committed to delivering quality marine accessories and OEM replacement parts to satisfy fishing, boating and watersports enthusiasts worldwide. Seachoice is run for and by boaters, offering a wide-ranging product line while remaining affordable.