Zeluga safety vinyl shark knife with dual magnet and 2 notches and 100ft. bold string chalk line reel combo pack. Ergonomically designed utility knife contains a low friction lock screw for quick and easy blade change without needing tools. Hinged aluminum body has a storage area for extra blades for easier blade installation. The Shark Knife uses utility or hook blades and comes with a plastic holster with a belt clip. For use with hook or utility blades (blades not included). Comes with a bonus compact holster. Dual magnets points and two notches. Fits most standard utility, concave and hook blades. Easy blade change with a quick rotating wheel. Somewhere between a felt-tip marker and a chisel tip marker, lies line left by our bold chalk line.. This string is more often used in higher traffic areas and outdoors. Unique shape great for corner work. Heavy-duty steel crank for long life. Holds 3 oz. of chalk. 100 feet bold string.