Customer Review: I couldn't find one of these at any of the "big box stores" so I got it from here, which is better anyway since I probably would have paid more at the store I'm sure. These wheels don't wear down for a long time. I've still got the original in my 500X and that's after sharpening at least 100 bits... more info
Customer Review: Works well as does all the drill doctor products. If you have left handed bits this is a must have item as the normal chuck does not sharpen left handed bits-it actually makes them worse(I know I tried til it dawned on me that maybe a regular drill docor chuck will not sharpen them;drill doctor... more info