Grindstone to better protect your hands</br>Volume is small?? convenient to carry</br>Great for sharpening on steel and stones</br>Quick and easy way to sharpen at the correct angle</br>Durable plastic body with protective ceramic inserts</br></br>Product Description</br></br>Depending on the width of the blade?? the guide will allow you to initiate the stroke at approximately 15-20 degrees. It can be used on a flat water/oil stone or a honing/sharpening steel of any type. After practicing with the device?? one will eventually develop the ability to free hand the stroke with amazing accuracy</br><br/>http://www.amazon.com/gp/product/B01MUW5WEE