Mundial BP5140-10 Used to sharpen the knife blades to maintain the razor-sharp edge. Features: -Sharpening steel. -5100 Series Black collection. -Fully forged, with a full tang and high-carbon stainless steel blades. -Long-lasting razor-sharp edge. -Perfectly balanced ergonomic three-riveted black polyacetal handle. -Quality and performance independently tested and verified as unsurpassed at any price point. -Made in Brazil. Specifications: -Material for knife blade: High-carbon stainless steel. -Material for knife handle: Polyacetal. -Lifetime guarantee. -Overall dimensions: 10" Height.