• World's first patented self-sharpening knife so you'll always have a razor-sharp edge
• Handle blade-channel has spring-mounted diamond sharpening hone - sharpens with each open/close
• Leaves slight burr on blade-edge; helps cut rope, cardboard - even ripe tomatoes easier
• Rugged & lightweight Zytel handle over stainless steel frame, raised-texture grip for firm hold
• Heavy-duty spring-steel belt & pocket clip, large thumb-hole for easy opening

An ingenious concept - a knife that sharpens itself every time you use it! Permanent 400-grit diamond sharpening hone is spring-mounted in blade-channel for precise pressure against edge with each open/close action; leaves slight burr on edge which acts as mini-serrations for incredibly effective cutting of a variety of materials like cardboard, rope - even ripe tomatoes. Dimensions: blade length 2-3/4", overall length open 6-3/4", closed 4", 3.8 oz. Manufacturer's Lifetime Warranty and Jack's Tool Shed worry-free Satisfaction Guarantee.