OLFA Ultra Slim Stainless Steel 9mm Precision Auto-Lock Knife features a stainless steel body and comes with a stainless steel snap-off blade that's perfect for wet use and won't rust. The OLFA Ultra Slim Stainless Steel Precision Auto-Lock Knife 9mm also comes with an auto-locking blade mechanism that keeps the blade firmly in place at any extension and also includes a pocket clip that doubles up as a blade snapper.