Wooden lapping sticks are used for final polishing on mould tools and dies. They are used as a carrier for diamond compound to create a high mirror finish on most metals but mostly steel.
Wooden lapping sticks can be used either by hand or with a reciprocatory tool such as a Diprofil which can significantly speed up the process.
Using lapping fluid helps to lubricate the process and can also help bring on a better shine on steel. A low cost but high quality option.
Round sticks have a pointed end making them ideal for getting into detail and tight areas.
Hardwood is slightly faster cutting, felt lapping sticks could also be used afterwards for polishing.