Because it comes with a video for explanation of the product (I have attached to what I bought but I do not know what you are talking about because it is a foreign language) If you look it is easy to use and the sharpness recovers spectacularly I will. The larger one also fits the second blade, so it is suitable for thick bits and stainless steel.
On 2013-04-17 09:03:44
I sharpened nothing at all and I can not finish it after all
On 2010-12-06 06:19:50
The cutting edge of the drill has been sharpened. The core of the drill is not slipping.