All I want for Christmas...is a DrillDoctor!

We use one at work and it does a good job of getting them sharp again.

 

I have the 750, It does a good job. I have sharpened some cobalt bits with no problem. It even will split the point. Although let me say, I dont think the bits will ever last as long on the second sharpening as the first. I believe the factory bits are hardened and once this hardness is removed it will never hold the sharpness it did when new. But yes by all means they are worth the money in my opinion.