Great Neck Snap-Off Utility Knife Set, 9 mm Knife, 18 mm Knife, Orange/Black The Great Neck-2 Piece Snap-Off Utility Knife Set includes a 9 mm and 18 mm snap-off knife and is perfect for light duty cutting of paper, vinyl, and leather. The end of the blade snaps off easily to provide a fresh new cutting edge, with a locking slide to ensure safety. A convenient pocket clip makes it easy to carry around.