LEIGAO APPLICATION:Suitable for variety of knives,fishing hooks, serrations and the gut hook. FUNCTION:Time and energy saving with quick sharpen. MATERIAL:It is made of diamond,the grinding layer is fine and smooth, which greatly prolongs the service life of the knives. SIZE:Sharpen pen 130*6.5mm,Sharpen stick (Length 124mm,Upper diameter 12mm,Down diameter 9mm.) PORTABLE:It shapes like a pen,very easy to carry,you can take it everywhere. Item Size: Approx.(L*W)Sharpen pen 130*6.5mm,Sharpen stick (Length 124mm,Upper diameter 12mm,Down diameter 9mm.). Color: Blue and Silver. Gross Weight: Approx.50g. Main Material: Diamond. Note: 1.1 Inch=2.45cm/1cm0.393inch 2.Please allow 1-3 cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Including 1 Set Pen Grinding Rod