DinaSaw® ABN Sharpening DiscsThe DinaSaw ABN Cyclone grinding wheels are designed with a specialised blend of Amber Boron Nitride particles, specifically tailored for optimal sharpening of hardened steel chains. These high quality CNC machined grinding wheels are perfectly balanced and feature a unique design that ensures cool air is directed onto the grinding surface to reduce heat and prevent tooth burning. This results in an exceptionally long working life with no need for