Blocks handheld Knife sharpeners come in many different colors , All work the same. Get 4 Knife sharpeners Put your color choose in checkout instructions. Our Knife sharpeners have a patent flex design in the sharpeners handle that able the honing rods to adjust to your knife cutting edges. This hones your blades. If your not sure how to use our Knife sharpener? We have how to video’s on our website and You-Tube site. (Block Knife sharpener) Our Website can be found on the Knife sharpeners handle in fine print for your convince.