Compact design!!! Introducing an essential item for anglers to sharpen their fishing hooks! This item has "diamond powder" sprayed on one side, and you can easily restore the hook point just by sharpening the hook along the groove (*^▽^*) The back side is untreated, so it's safe even if it comes into contact with other fishing tackle. It comes with a chain, so it's convenient to keep it with other fishing accessories on a keychain or carabiner♪ You can quickly and rhythmically sharpen your hooks without having to take them out of your tackle box. We recommend using this hook sharpener together with our: "Stretchy Key Holder" and "Split Ring Opener" which are also sold in our store. Product Specifications Color: Silver Material: Steel, Diamond Powder (Surface Only) Size: 64mm x 19mm Weight: Approximately 10g