Drill bits are expensive and I tend to be somewhat abusive to them. It is cheaper to sharpen them than to replace, especially for the larger drill bits. Read more to check out my experience with a Drill Doctor Drill Bit Sharpener. Tools of the Trade! – Drill Doctor Bit SharpenerMay 14, 2018 in FABRICATION KNOWLEDGE / TOOLS OF THE TRADE! tagged DD350X / DD500X / DD750X / DIY Drill Bit Sharpening / Drill Doctor / Home Sharpening / Sharpen Drill Bits / Split Point by Paul