Features: The kit is precision engineered, multi-angle, folding knife clip. Storage case: the storage case for all system components, convenient to transport and store. Professional: This sharpening system ensures that the edge of your knife sharpens to the exact bevel. Designed to give your blade a professional edge. Sharpening Angle: Sharpening systems allow the user to select the appropriate sharpening angles for the intended use of their knife. Grooved Sharpening: Includes Ultra Fine Sharpener, Coarse Black Sharpener, Fine Sharpener, Coarse Red Sharpener, and Medium Grit. Specifications: Dimensions of the storage case: 215 x 110 x 40 mm. Weight: 500g. Materials: plastic, stainless steel. Color: multicolor. Contents: 1 storage box. 1 cutting pliers with angle selector. 5 grooved sharpeners for fingers. 5 guide rods. The four sharpening angles and their uses: 1) 17 Angle: A severe angle recommended for razor blades, extremely sharp but delicate edge. 2) 20 angle: an angle commonly used for premium quality blades, it provides an excellent edge for kitchen cutlery and slicing knives. 3) 25 angle: the recommended angle for most knives that need a durable sharp edge, such as knives hunting and outdoors. 4) 30 angle: designed for knives that cut cardboard, rope or carpets. Notes: 1. Due to manual measurement, size shown may vary by 1-3mm. 2. Item color may vary from that of the photo, depending on your computer's display and brightness settings.