1x Depressed Centre Grinding Wheel

Natural waxes help repel water and add protection

And finally

Forged steel head

Incra Precision Metric Centre Rule 300mm D-07945 1x Depressed Centre Grinding WheelINCRA's Precision Centre Rule offers unparalleled accuracy find the exact centre of any workpiece up to 300mm or 12" wide. With patented marking holes to mark in rather than just etched graduations, these Rules allow you to mark out precisely with no risk of error. Just select the slot or hole, insert a 0. 5mm mechanical pencil, and mark the measurement with complete accuracy unmatched in the industry of Marking Rules! One of the fundamental errors