滾花，細直紋

I was a bit worried the 33 lines per inch would be too fine for my mild steel, but the high speed steel holds its edge perfectly and the pattern came out super crisp. The 3/4 inch diameter feels solid in the lathe too.

The knurls cut clean and consistent patterns right out of the box, no wobble at the 3/4" diameter. The 1/4" shaft hole seated perfectly on my holder, and 33 lines per inch gives just the right grip for my tool handles.

Mounted these on my lathe and the 33 lines per inch pattern came out perfectly consistent on 6061 aluminum. The 3/4 inch diameter fit my toolpost fine and the 1/4 inch shaft hole was precisely centered.