The Benchmade 583SBK Barrage Tanto AXIS-Assist Knife Black Serrated is a strong knife with quick spring assisted action. Use the ambidextrous thumb studs to prompt the AXIS-Assist mechanism. For those who like the peace of mind that a safety offers, you'll be glad to know there's one on the handle back. Includes a reversible pocket clip for easy carry. The 583SBK has a CM-154 tanto part serrated point blade that is BK1 coated.