Removing burrs does not hurt the hands and improve efficiency.
Any thread can be ground.
It is suitable for all kinds of chuck drill and meet different needs.
Size: inner diameter 22mm/0.87", outer diameter 28mm/1.1" (specific size,reference picture)
1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
2. Please allow slight measuring deviation due to manual measurement.
1 x Chamfer